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1. 1 3 1 3 CUnet Configuration using 5 2 2 1 0 nnne nnn 1 4 1 3 4 Extending Total Length of Network Cable esee 1 4 1 3 2 Branching Multi dropped Network 1 6 1 3 3 Eliminating Connection or Disconnection of Termination Resistor to or from Each Device 1 7 1 3 4 5 2 5 2 5 102 eaae 1 8 1 3 5 Handling Fiber optic 1 9 1 4 Basic 1 10 1 5 Multi drop Network of HUBS 1 11 1 6 Port Addition to icc cir iat ex xd a Da i i ia ot i ala a la 1 12 1 7 MKYO2 Operation agni 1 13 1 7 1 Receiving and Sending Packets 1 13 1 7 2 Sigrial Correction otita iati aicea esed 1 14 1 7 3 Detection of Error Packet lessen eene nennen nennen 1 14 1 6 Features of MKYOO scie i a a ia aa n d i ti n e a CER ED UG if 1 15 Chapter 2 MKYO2 Hardware nnmnnn 2 3 Chapter 3 Single Connection of MKY02 3 1 Voltage Levels of Pins Connecting to Signa
2. 4 6 Connection of Cascade Clocks eese 4 7 Monitor Placement Example for Port added 4 9 Example Circuit for HUB with 24 eere 4 10 Tables Baud Rates and Recommended Total Extension Number 5 ii ac a iama gina anna 1 4 Pin Functions or MKYQG2 iv tata c bataia aaa 2 4 Electrical Ratings of 2 2 6 Output Frequencies of Cascade Clocks eese 3 6 Absolute Maximum 5 5 3 Electrical Ratings aie ti aula aaa la a adu Ea Dada da da la a alta 5 3 AC Characteristics Measurement Conditions 5 3 viii Chapter 1 Concepts for Using MKY02 HUB This chapter describes the concepts for using the MK Y02 HUB in the CUnet 1 1 1 2 1 3 1 4 1 5 1 6 1 7 1 8 Role ot Str at a 1 3 Basic CUnet 1 3 CUnet Configuration using HUBS ee 1 4 Basic HUB Connection initia nt ni minti ina anton
3. 3 16 TEP S TECHNICA Co LTD MKYO02 User s Manual for CUnet Chapter 4 Cascade Connection of MKY02 41 Concepts of Port Addililon eintreten tene 4 3 4 1 1 Port Addition by Stacking 4 3 4 1 2 Port Addition by Cascade Connection seen eene 4 4 4 1 3 Maximum Available Cascade Connections eese 4 4 4 2 Practical Side of Cascade Connection eese 4 5 4 24 Cascade PINS er ee 4 5 4 2 2 Operation of Cascade Connection Pins eee 4 6 4 2 3 Connection of Cascade Clocks and Determination of Baud Rate 4 7 4 2 4 Connection of Hardware Reset Signal eese 4 8 4 2 5 Handling of Each FH Pin neuere iei 4 8 4 2 6 Connection of Each 22 222 4 8 4 2 7 Placement of Monitor 1 4 9 4 3 Example Circuit for Port added HUB by Cascade Connection 4 10 Chapter 5 Ratings 5 1 Pa c Pria vua Cu 5 3 5 2 Characterisli6S oi n altu bu Daia ua 5 3
4. Port receive monitor circuit RLLD RLCK DIP SW RLDT 53 25 V 100 uF 77 BPS1 52 NC open A BPSO 0 7 FH ES Note Add as necessary To two 74273 1 pins 3 3 V 77 os 173249 Oscillator 48 MHz 104 OUT 64 17 32 49 449 GND EE 1 16 33 48 os 2 27 Voltage detection reset IC etc 35 50 104 OUT erst A Low level is output at reset GND 7 7 RST 7 7 Fig 3 16 Example of Single Connection Circuit 3 16 Chapter 4 Cascade Connection of MKY02 This chapter describes the pin functions and how to connect pins required to design a multiport HUB with nine or more ports refer to 1 6 Port Addition to HUB config ured using multiple MKYO2s to be inserted into the CUnet 4 1 Concepts of Port Addition ceres 4 3 4 2 Practical Side of Cascade Connection 4 5 4 3 Example Circuit for Port added HUB by Cascade Connection eere 4 10 Chapter 4 Cascade Connection of MKY02 SEE TECHNICA Co LTD Chapter 4 Cascade Connection of MKY02 This chapter describes the pin functions and how to connect pins required to design a multiport HUB with nine or more ports refer to 1 6 Port Addition to HUB configured using multiple MK Y02s to be inserted into the CUnet 4 1 Concepts of Port Addition This section describes the concepts of port addition to a HUB using multiple HUB ICs
5. 2 that can be cascade connected Therefore the HUB to which ports were added by cascade connection has a maximum of 64 ports 8 x 8 025 TEP Chapter 4 Cascade Connection of MKY02 ST ECHNICA 1 4 2 Practical Side of Cascade Connection This section describes the practical side of cascade connection 4 2 1 Cascade Pins The 2 has the priority cascade pins pin 60 pin 59 CID1 58 CIHR pin 57 COE pin 20 COPI pin 21 CODI pin 22 pin 23 and the reverse priority cascade pins CIE2 pin 25 CIP2 pin 26 CID2 pin 27 COE2 pin 56 COP2 pin 55 and COD2 pin 54 To cascade connect the 2 proceed as follows refer to Fig 4 3 and Fig 4 4 1 Fix the cascade pins CIx1 CID1 and CIHR of the highest priority 02 at Low 2 Connect the cascade pins COx1 CODI COP1 of the MK Y02 to the cascade pins CIx1 CIE1 CID1 CIP1 and CIHR of the 2 with next priority 3 Leave the cascade pins COx1 COEI CODI COPI and of the 2 with the lowest pri ority open 4 Fix the cascade pins CIx2 CIE2 CID2 CIP2 of the MKYO2 with the lowest priority at Low 5 Connect the cascade pins COx2 COE2 COD2 COP2 of the MKYO2 to the cascade pins CIx2 CIE2 CID2 CIP2 of 2 with next reverse priority 6 Leave the cascade pins COx2 COE2 COD2 COP2
6. Reset enable Low level width 10 x BPS1 pin BPSO 50 TAXO TAXS1 TAX1 TAXS2 TAX2 Remarks Xi 48 MHz 4 x TXI 8 x TXI 8 x TXI 16 x TXI 16 x TXI 32 x TXI 32 x TXI 64 x TXI i Input the clock output from AXSO pin to pin Reference d Input the clock output from AXSI pin to AXI pin Input the clock output from AXS2 pin to AX2 pin Chapter 5 Ratings 5 2 2 Port Pin Timing TXEO to 7 TXDO TXD17 RXDO to 7 TEP S TECHNICA Co LTD TTXEH TXEO to 7 RZ 1 RZ 1 RZ 0 RZ 0 RZ 1 TXDO TXD17 5 5 RZ 1 RZ 1 RZ 0 RZ 0 RZ 1 RXDO to 7 TRNW TRWW TRWW Passage of time Symbol Short pulse width of sendng signal Unit Period in which TXE 197 x TAX1 5ns Remarks Short pulse width of 0 51 1 input signal 1 0 x TAX1 1 49 x TAX1 Allowable pulse width for RZ signal Long pulse width of 1 51 1 input signal 2 0 x TAX1 2 49 x TAX1 Allowable pulse width for RZ signal TEP S TECHNICA Co LTD MKYO02 User s Manual for CUnet 5 2 3 Cascade Connection Pin Timing Tcs1 COE1 CIE1 COHR CIHR COE2 CIE2 Tcs2 COP1 CIP1 COP2 CIP2 COD1 CID1 COD2 CID2 Tcs3 Cascade connection signal 1 Tcs3 Passage of time 197 x TAX1 5ns Cascade connection signal 2
7. S TECHNICA Co LTD E 6 mca HuB ic MKYO2 User s Manual for CUnet Note 1 The information in this document is subject to change without prior notice Before using this product please confirm that this is the latest version of this document 2 Technical information in this document such as explanations and circuit examples are refer ences for this product When actually using this product always fully evaluate the entire sys tem according to the design purpose based on considerations of peripheral circuits and the PC board environment We assume no responsibility for any incompatibility between this product and your system 3 We assume no responsibility whatsoever for any losses or damages arising from the use of the information products and circuits in this document or for infringement of patents and any other rights of a third party 4 When using this product and the information and circuits in this document we do not guaran tee the right to use any property rights intellectual property rights and any other rights of a third party 5 This product is not designed for use in critical applications such as life support systems Con tact us when considering such applications 6 No part of this document may be copied or reproduced in any form or by any means without prior written permission from StepTechnica Co Ltd EP T S TECHNICA Co LTD MK Y02 User s Manual Preface
8. 1 10 Multi drop Network of HUBs eren 1 11 Port Addition to HUB aaa aa iama aaa aia aia ua iai 1 12 02 ina n e 0 at 1 13 Features of 2 ioan 2064 c aaa aie 1 15 TEP Chapter 1 Concepts for Using MKY02 HUB SIFECHNICA Chapter 1 Concepts for Using MKY02 HUB This chapter describes the concepts for use of MK Y02 HUB in CUnet 1 14 Role of MKY02 MKYO2 is a kind of HUB IC that constitutes HUB to be used in the CUnet network Be sure to read the CUnet Introduction Guide and the User s Manuals for the various CUnet ICs before using the 2 and understanding this manual 1 2 Basic CUnet Configuration Figure 1 1 shows the basic CUnet configuration with CUnet ICs connected on a multi drop network Rt in the figure indicates a termination resistor Recommended full cable extension 12 Mbps 100 m 6 Mbps 200 m 3 Mbps 300 gt Multi drop network User equipment User equipment User equipment User equipment User equipment Connect a termination resistor Rt at both ends of the network cables Fig 1 1 Basic CUnet Configuration Some user systems may need the following for the basic CUnet configuration 1 To extend the total length of a network cable 2 To branch pieces of multi dropped network 3 To eliminate connection or disconnection
9. Cascade clock output pin Positi ostve For details refer to 3 2 2 Setting Cascade Clock and Baud Rate Continue TEP Chapter 2 MKY02 Hardware T ECHNICA CO LTD Table 2 1 Pin Functions of MKY02 Continued Cascade clock input pin P Sons For details refer to 3 2 2 Setting Cascade Clock and Baud Rate The LED driving output pin that keeps Low for a given time when packet is received from any port This pin also keeps Low when a hardware reset is activated Leave this pin open when it is not used LEDRCV Negative The LED driving output pin that keeps Low for a given time when an error packet is received from any port This pin also keeps Low when a hardware reset is activated Leave this pin open when it is not used LEDRZE Negative Positive Be sure to connect this pin to GND pin manufacturer test pin Positive Be sure to connect this pin to GND pin manufacturer test pin Positive Be sure to fix this pin at Low This is input pin to set MK Y02 as Cunet Input pin without function Positive Keep this pin High or Low When left open the pin can be kept High by internal pull up resistor Input pin that selects MK Y02 baud rate Positi For details refer to 3 2 2 Setting Cascade Clock and Baud Rate Input pin that selects 2 baud rate Bogie For details refer to 3 2 2 Setting Cascade Clock and Baud Rate Output pi
10. eere 3 12 Fig 3 12 RLDT and RLCK 3 13 Fig 3 13 8 port Receive isca saci a anna aa s dn a ERE o Ex Aaa dn 3 14 Fig 3 14 4 port Receive nnmnnn nnna 3 14 Fig 3 15 Handling of Cascade Connection Pins 3 15 Fig 3 16 Example of Single Connection 3 16 vii TEP S TECHNICA Co LTD Fig 4 1 Fig 4 2 Fig 4 3 Fig 4 4 Fig 4 5 Fig 4 6 Fig 4 7 Fig 4 8 Fig 4 9 Fig 4 10 Table 1 1 Table 2 1 Table 2 2 Table 3 1 Table 5 1 Table 5 2 Table 5 3 MKYO02 User s Manual for CUnet Addition of Three stacked Ports 4 3 Port Addition by Three Cascade Connections 4 4 Cascade Pin Connection for Three 025 4 5 Cascade Pin Connection for Two 25 4 5 Operation when Port 11 Receives a Packet 4 6 Operation when Port 23 Receives a Packet 4 6 Operation when Port 0 Receives a Packet
11. 1 11 Fig 1 9 Adding Ports by Cascading 25 1 12 Fig 1 10 Number of Inserted HUBs with Added Ports 1 12 Fig 1 11 MKYO2 Operating Principles ceres 1 13 Fig 1 12 Example of Signal Transformation and Correction 1 14 Fig 2 1 2 Pin Assignment ice r cc nii ae cu aa iata dia cae 2 3 Fig 2 2 Pin Electrical Characteristics in I O Circuit Types of MKY02 2 6 Fig 3 1 Connection Causing Leakage Current eene 3 4 Fig 3 2 Cascade Clock Generation esee eicere nennen nne 3 6 Flg 3 3 Clock ConnectlOR cuia rax curn aeris 3 6 Fig 3 4 Hardware Reset sri za ia a ana iad Dl a 3 7 Fig 3 5 Handling of FH ceia poa aan n aia iau aaa aaa da aan 3 8 Fig 3 6 Connection of Port 0 3 8 Fig 3 7 Connection of Ports 1 tO 7 nnn 3 9 Fig 3 8 Connection of HUB with 4 Ports esee 3 9 Fig 3 9 Recommended Network Connection eese 3 10 Fig 3 10 Connection of Receive Monitor LED eee 3 11 Fig 3 11 Connection of Packet Error Monitor LED
12. SIG SIG 77 34 5 a 5 5 c1 Pulse shield a a 5 transformer gt 5 2 29 42 7 7 1 d 4CLR 1 3 40 06 05 04 03 02 D 36 18 t 4 18 17 3 o 19 18 16 17 15 14 12 13 9 8 6 7 2 34 10 38 33V 1 16 33 48 1044 2441 77 CIE1 COE1 2 33V 3 pin regulator etc CIP1 copi cob 2 Vout B 2 2 CIHR COHR GND 2 2 CIE2 104 CIP2 COP2 CIP2 COD2 2 Mi RST 1 AX2 1 0 Fig 4 10 Example Circuit for with 24 Ports 3 3 4 12 Chapter 5 Ratings This chapter describes the ratings of the 2 5 1 5 2 5 3 5 4 5 5 Electrical Ratings saos Dri eR ia Ga GRE CEA 5 3 AG Gharacterisfi6S nce ri Dx cx DRE 5 3 Package Dimensions ecce 5 8 Recommended Soldering Conditions 5 9 Recommended Reflow Conditions 5 9 Chapter 5 Ratings TEP S TECHNICA Co LTD Chapter 5 Ratings This chapter describes the ratings of the MK Y02 5 1 Electrical Ratings Table 5 1 lists the absolute maximum ratings of the MKYO2 Table 5 1 Absolute Maximum Ratings Vss 0 V Power supply voltage 0 3 to 44 6 Input voltage Output voltage Vss 0 3 to 6 0 Vss 0 3 to 6 0 Signal
13. 2 CUnet IC User equipment Rt CUnet IC CUnet IC CUnet IC User equipment User equipment User equipment Fig 1 5 Star Topology TEP Chapter 1 Concepts for Using MKY02 HUB SIFECHNICA 1 3 5 Handling Fiber optic Cables Branching or connecting optical signals is extremely difficult so multi drop network of half duplex trans mission signals using fiber optic cables is very complicated and expensive Fig 1 6 1 E O 1 receives a packet sent by user equipment 1 and then supplies it to an RXD of user equipment 2 while driving E O 2 to relay an optical signal to user equipment 3 2 A packet sent by user equipment 2 driving E O 1 and E O 2 transmits an optical signal to user equipment 1 and 3 3 E O 2 receives a packet sent by user equipment 3 and then supplies it to an RXD of user equipment 2 while driving E O 1 to relay an optical signal to user equipment 1 E O Interactive optical to electrical converter What types of circuit can be connected It is complicated Fiber optic cables pow TE 1 1 1 1 1 22 22 22 TEL v v L CUnet IC CUnet IC CUnet IC User equipment 1 User equipment 2 User equipment 3 Fiber optic cables Fiber optic cables LI CUnet IC CUnet IC CUnet IC User equipment 2 User equipment 3 User equipment 1 Fig 1 6 Connection of Fiber optic Cables Adding HUBs into the network usi
14. MKYO02 User s Manual for CUnet 1 3 2 Branching Multi dropped Network Cables The network cables can be branched by adding HUBs to the CUnet network Figure 1 3 shows an example of an CUnet configuration in which network cables are branched Branching network cables in basic configuration Branching network cables is impossible due to impedance mismatches Rt Rt CUnet IC CUnet IC CUnet IC User equipment User equipment User equipment User equipment User equipment CUnet IC User equipment CUnet IC User equipment Branching network cables by addition of HUB Adding HUB enables branch of network cables HUB Rt Rt CUnet IC CUnet IC CUnet IC CUnet IC User equipment User equipment User equipment User User equipment Recommended cable length 12 Mbps 100 m CUnet IC 6 Mpbs 200 m User equipment 3 Mbps 300 m CUnet IC User equipment Fig 1 3 Multipoint Connection of Network Cables Figure 1 3 shows the network cables that are branched in T shape Adding a HUB using the 02 also enables multiple branchings with many ports Chapter 1 Concepts for Using MKY02 HUB SEE TECHNICA Co LTD 1 3 3 Eliminating Connection or Disconnection of Termination Resistor to or from Each Device In a network using the CUnet termination resistors Rt cannot be connected to the terminal connected in the intermediate position the halfway position in the network cable of the
15. TECHNICA CO LTD MKYO02 User s Manual for CUnet 3 3 Connecting Network Interface This section describes connection of a network interface network The 2 is IC with eight ports The 02 has eight sets of network I F pins Port 0 has three network pins RXDO TXEO and TXDO Ports 1 to 7 correspond to the RXD1 pin to RXD7 pin and the TXEI pin to TXE7 pin respectively but there is no individual TXDn pin There is one common TXD17 pin 3 3 1 Handling of FH Pin The FH pin pin 51 of 02 does not function when designing a HUB for CUnet Therefore fix this pin at High or Low Fig 3 5 When left open the pin can be fixed at High by an internal pull up resistor 2 2 2 3 3 51 51 sS d FH 777 When left open FH can be fixed High Fix FH High Fix FH Low Fig 3 5 Handling of FH Pin Reference CUnet supports half duplex mode In this mode signals output from TXD pins of the EL MKYO 2 may be input directly to pins of the 2 while the MKYO2 is trans mitting packets The 02 is designed not to input data when the pin is High so there is no problem 3 3 2 Connection of Port 0 Connect the TRX driver receiver components of port 0 to three network I F pins RXDO TXEO and TXDO Fig 3 6 MKY02 TRX Driver input Driver enable Receiver outp
16. This manual describes the 02 or a kind of HUB IC in the CUnet Be sure to read CUnet Introduction Guide before understanding this manual and the MKY02 Target Readers This manual is for Those who first build a CUnet Those who first use StepTechnica s various ICs to build a CUnet Prerequisites This manual assumes that you are familiar with Network technology Semiconductor products especially microcontrollers and memory Related Manuals CUnet Introduction Guide CUnet Technical Guide CUnet IC Manuals Caution Some terms in this manual are different from those used on our website and in our product bro chures The brochure uses ordinary terms to help many people in various industries understand our products Please understand technical information on HLS Family and CUnet Family based on technical documents manuals B This manual has been prepared based on Standard English meeting the requirements of the International Organization for Standardization ISO and the American National Standards Institute ANSI This English manual is consistent with the Japanese document STD CUHO2 V1 4J Standard English is a trademark of Win Corporation TEP S TECHNICA Co LTD MKYO02 User s Manual for CUnet EP T 2 User s Manual ST ECHNICA CO LTD CONTENTS Chapter 1 Concepts for Using 02 HUB 1 1 Role of Sim 1 3 1 2 Basic
17. 5 21 Clock and Reset 5 4 5 2 2 Port Pin Timing TXEO to 7 TXDO TXD17 RXDO to 7 5 5 5 2 3 Cascade Connection Pin nnna 5 6 5 2 4 Output Timing of ZLEDRCV and LEDRZE Pins eene 5 6 5 2 5 Timing of Receive Monitor Pin of Individual Port RLLD RLDT RLCK 5 7 5 3 Package Dimensions db aaa daia n aia a na ei rm 5 8 5 4 Recommended Soldering Conditions ecce 5 9 5 5 Recommended Reflow 1111111 eene nennen 5 9 vi TEP S TECHNICA CO LTD 2 User s Manual Figures Fig 1 1 Basic CUnet Configuration esses nnne nnns 1 3 Fig 1 2 Extension of Network Cable Length eene 1 4 Fig 1 3 Multipoint Connection of Network Cables cene 1 6 Fig 1 4 Eliminating Problems with Termination Resistors 1 7 Fig 1 5 Star Topology EHE ER 1 8 Fig 1 6 Connection of Fiber optic Cables esee 1 9 Fig 1 7 Basic Connection and Number of Inserted HUBS 1 10 Fig 1 8 HUB in Intermediate Position of Multi drop Network
18. Cascade connection signal 3 TCS1 10 x TAX1 2 x TAX1 TCS1 10 x TAX1 5ns 2 x 1 5 ns TCS3 High or Low level short pulse width 2 x TAX1 5 ns 5 2 4 Output Timing of ZLEDRCV and LEDRZE Pins TLED LEDRCV LEDRZE Pin Low level width 500 000 2 TEP Chapter 5 Ratings S Tc H N ICA CO LTD 5 2 5 Timing of Receive Monitor Pin of Individual Port RLLD RLDT RLCK TRLLD RLLD RLDT RLCK Passage of time de TRLDS TRLDH TRLCH TRLCL Monitor status update interval 217 1 x 1 217 x 21741 x TAX1 RLDT output time 215 1 x TAX1 215 x TAX1 21541 x TAX1 RLDT bit time 212 1 x TAX1 212 x TAX1 21241 x TAX1 RLDT Setup 211 1 TAX1 211 x TAX1 21141 TAX1 RLDT Hold 211 1 TAX1 211 x TAX1 21141 TAX1 RLCK High level width 211 1 TAX1 27 x 1 21141 x TAXI RLCK Low level width 211 1 x TAX1 211 x 1 21141 x TAXI TEP HNICA MKYO02 User s Manual for CUnet 5 3 Package Dimensions MKY02 64 pins TQFP 12 0 0 2 12 0 0 2 1 0 0 05 1 2 MAX 0 6 0 15 Unit mm TEP Chapter 5 Ratings S Tc H N ICA CO LTD 5 4 Recommended Soldering Conditions Parameter Symbol Reflow Manual soldering iron Peak tempera
19. Port receive monitor circuit ctl 1 SIG al 6 SIG Wes SS oS og 2 a 5 5 5 5 5 5 shield H ransformer 5 5 a 2 19 9 6 5 2 29 7 7 1 1 31 40 74273 3 3 V etc 10 38 64 17 32 49 33V 1 16 33 48 10454 7 7 20 coe E COD1 2 CID1 i 2 1 COHR cour 23 CIHR 02 3 i CIE2 25 2 i CIP2 28 COP2 27 COD2 HRST AX1 AX2 J 50 To 3 3 Fig 4 10 Example Circuit for HUB with 24 Ports 2 3 4 11 TEP TECHNICA Co LTD MKYO02 User s Manual for CUnet Port 16 ADM1485 5 V Error Port 16 to Port 23 45 SIG 3 62 LEDRZE PP Rt 4 SIG 4 LEDRCV Jo 51 shield Pulse 33V transformer gt 50 12 77 ADM 1485 5 V Port 23 gt 17 ADM1485 5 V 6 SIG 516 1 3 6 Pulse shield ranstormer Rt 4 on Sel sic 2 29 shield 6 Pulse transformer 7 2 ADM1485 5 V Port 22 7 13 3 ERE SIG Port 18 ADM1485 5 V 5 a EJ SIG SIG 1 3 7 Pulse shield lt lt 1 5 9 SIG 2 gt 29 shield 6 Pulse transformer 3 4 1485 5 V Port 21 Port 19 ADM1485 5 V 6 SIG SIG 1 3 15 Pulse shield lt SIG 2 gt 20 shield 6 Pulse Mi transformer B 1 43 ADM1485 5 V Port 20 Port receive monitor circuit 6
20. adding the inserted count of HUBs 1 to the basic CUnet configuration For example adding a single doubles cable length adding two HUBs triples cable length Table 1 1 shows the baud rates and the recommended total extension based on the number of the inserted HUBs when using the recommended network connection Table 1 1 Baud Rates and Recommended Total Extension Number of Inserted HUBs Number of inserted HUBs 0 Basic configuration 1 2 TEP Chapter 1 Concepts for Using MKY02 HUB SIFECHNICA CO LTD Reference ers cable types cabling environments and how many cables are multi drop connected The practical limit of network cable length varies with the performance of drivers receiv StepTechnica s recommended network cable length is about 1 2 of the cable length limit obtained from our practical experiments These values are provided as a guide for stable CUnet operation in various user systems but performance 1 not guaranteed Therefore in many user systems the user can use the network cable longer than the total length shown in Table 1 1 The maximum number of HUBs that can be added is determined by the function of CUnet ICs For example if the user system uses the 40 as CUnet IC the user can add up to two HUBs For details refer to User s Manuals for various CUnet ICs SEE TECHNICA CO LTD
21. clocks must be supplied to the AXI and AX2 pins of all 25 to be cascade connected Therefore when connecting cascade clocks equalize the circuit pat tern length of three clock lines The circuit pattern length must be within 40 cm TEP S TECHNICA Co LTD MKYO02 User s Manual for CUnet 4 2 4 Connection of Hardware Reset Signal Connect the hardware reset signal common to all 25 to be cascade connected to the RST pin pin 35 Fig 4 8 For the specification of the hardware reset signal follow the description in 3 2 3 Hardware Reset 4 2 5 Handling of Each FH Pin The FH pin pin 51 of MK Y02s does not function when designing a HUB for the CUnet Fix this pin of all MKY02s to be cascade connected at High or Low by referring to 3 3 1 Handling of FH Pin 4 2 6 Connection of Each Port In the port added HUB configured using cascade connecting multiple MKYO2s connect the TRX to port 0 of the 2 refer to 3 3 2 Connection of Port 0 and to each port 1 to 7 of the 02 refer to 8 3 3 Connection of Ports 1 to 7 For the handling of unused ports refer to 3 3 3 Connection of Ports 1 to 7 If multiple MKYO2s are cascade connected ports are assigned priorities in descending order Therefore number the ports according to priority Fig 4 2 TEP Chapter 4 Cascade Connection of MKY02 ST ECHNICA LTD 4 2 7 Placement of Monitor LEDs The 2 has the fu
22. multi drop network However a to one connection between all terminals can eliminate connection or disconnection of termination resistor to or from each device and simplifies the complexity of system installation as shown in Figure 1 4 Rt CUnet IC User equipment Rt CUnet IC User equipment 2 CUnet IC User equipment CUnet IC 2 User equipment HUB Rt Rt Rt Rt HUB IC Rt Rt Rt Rt 2 CUnet IC User equipment 2 CUnet IC User equipment 2 CUnet IC User equipment ug CUnet IC User equipment 4g CUnet IC User equipment A CUnet IC User equipment HUB Rt Rt Rt Rt HUB IC Rt Rt Rt Rt Rt CUnet IC User equipment Rt CUnet IC User equipment Rt CUnet IC User equipment Rt CUnet IC User equipment Fig 1 4 Eliminating Problems with Termination Resistors TECHNICA Co LTD MKYO02 User s Manual for CUnet 1 3 4 Star Topology Mounting a HUB IC to the terminal containing the CUnet IC can offer a star topology Fig 1 5 Further more network cables in a star topology can also be multi drop connected Center equipment Rt CUnet IC HUB IC Rt ue Rt Rt Rt Am CUnet IC User equipment 2 CUnet IC User equipment A network cable in a star topology can also be multi drop connected AD CUnet IC User equipment CUnet IC User equipment
23. occupied area 5 The system is operating in an extremely poor environment The detection frequency of error packets increases in the order of 1 to 5 above For example in 1 error packets are detected only when the user equipment is disconnected but in 5 above error packets are detected frequently If error packets are detected the user should improve the system and environment TEP Chapter 1 Concepts for Using MKY02 HUB SIFECHNICA 1 8 Features of MKY02 This section describes the features of the MK Y02 HUB IC for the CUnet 1 Supports any baud rates up to 12 5 Mbps including standard baud rates of 12 6 and 3 Mbps 2 Has eight ports ports 0 to 7 facilitating configuration of a HUB with two to eight ports using one MKYO2 3 Has output pins that can turn on monitor LEDs when any one or more of the eight ports receive a packet 4 Has output pins for receiving monitor for each port to turn on monitor LEDs when eight ports receive packet 5 Has output pins that can turn on monitor LEDs when any one or more of the eight ports receive an error packet 6 Has pins for cascade connection that can add ports 7 Can be connected to both 5 0 V and 3 3 V TTL level signals using 5 0 V tolerant signal pins 8 Operates on 3 3 V single power supply and available in 0 5 mm pitch 64 pins TQFP es T Caution The 2 can also be used as a Hub for Hi speed Link System HLS family by setting
24. of termination resistor to or from each device 4 To use transmission systems such as optical fiber cables There will be difficulty solving these needs using such basic CUnet configuration shown in Figure 1 1 SEE TECHNICA Co LTD MKYO02 User s Manual for CUnet 1 3 CUnet Configuration using HUBs Adding HUBs to the CUnet network the user system can satisfy it s own needs 1 to 4 described above When adding a HUB to the network the CUnet ICs must be compatible with the HUB If incompatible CUnet ICs does not link correctly 1 3 4 Extending Total Length of Network Cable Adding HUB s to the CUnet network the user can extend the total length of the network cable Figure 1 2 shows an example of extending the total length of the network cable Rt in the figure indicates a termination resistor Adding a single HUB makes the total extension two times longer than recommended 12 Mbps 200 m 6 Mbps 400 m 3 Mbps 600m HUB CUnet IC CUnet IC User equipment User equipment User equipment User equipment User equipment Adding two HUBs makes the total extension three times longer than recommended 12 Mbps 300 m 6 Mbps 600 m 3 Mbps 900 m HUB HUB Rt CUnet IC User equipment User equipment User equipment User equipment User equipment User equipment User equipment Fig 1 2 Extension of Network Cable Length The user system can extend the recommended network cable length by
25. of the 2 with highest priority open Figure 4 2 shows that of the three 025 the 2 on the upper side is given the highest priority If multiple MK Y02s cascade connected ports are assigned priorities in descending order Therefore num ber the ports according to priority Fig 4 2 Priority Priority COE2 CIE2 COE1 COE2 CIE1 CIE2 COE1 CIE2 COE1 COE2 CIE1 CIE2 CIE1 COE1 COD2 C 002 COD1 OD2 CID2 ID1 001 002 CID2 COP2 2 COP1 CIHR COHR COP2 2 1 CIHR COP2 2 COP1 CIHR 2 2 1 CIHR Mi Fig 4 3 Cascade Pin Connection for Three MKY02s Fig 4 4 Cascade Pin Connection for Two 025 TEP ST ECHNICA CO LTD MKYO02 User s Manual for CUnet 4 2 2 Operation of Cascade Connection Pins The cascade connection pins of the cascade connected MK Y02 operate as follows refer to Fig 4 5 to 4 7 1 A packet received from any port is transmitted to all ports except the receive port and is also transmit ted to the priority cascade connection pins COPI CODI and the reverse pri ority cascade connection pins COE2 COP2 and COD2 2 The higher priority MK Y02 transmits the packet to all ports using the signal input
26. pins pins 1 16 24 33 41 48 to the 0 V power supply and all VDD pins pin 10 17 32 38 49 64 to the 3 3 V power supply In addition connect a 0 1 uF coupling capacitor 10 V 104 between adjacent VDD pins and GND pins TEP ST ECHNICA MKYO02 User s Manual for CUnet 3 1 Voltage Levels of Pins Connecting to Signal Pins All signal pins except those connected to VDD pins or GND pins of MKYO 2 are tolerant types that can be connected to 5 0 V TTL signals 1 The pins can directly be connected to peripheral logic circuits driven by the 3 3 V power supply 2 The pins can be connected to TTL level signals of peripheral logic circuits driven by the 5 0 V power supply A pull up resistor can also be connected between the 5 0 V power supplies However if the input voltage of the 2 pins exceed 3 3 V leakage current flows into the 2 pins Fig 3 1 3 Because the High level voltages does not meet the 5 0 V CMOS input specifications the 02 out put pins cannot be connected to the CMOS input pins of peripheral logic circuits driven by the 5 0 V power supply This pins cannot be connected even if a pull up resistor is used between the 5 0 V power supplies Fig 3 1 li an 5 0 V Output 7 4 4 5 0 V 50 i Type C D 5 0 V TTL Input 50V H i 5 0 V Output Type B 3 3 V Pull Pull up 5 0 y 99 V
27. the HC pin pin 50 However CUnet and HLS networks cannot be connected via the HUB Note that the MKYO2 is not a bridge for connecting networks using different family products Reference details of Hubs of the Hi speed Link System family refer to 2 User s Manual for Hi speed Link System TEP S TECHNICA Co LTD MKYO02 User s Manual for CUnet Chapter 2 2 Hardware This chapter describes the hardware such as pin assignment pin functions and input out put circuit type of the 02 Chapter 2 MKY02 Hardware Chapter 2 2 Hardware This chapter describes the MK Y02 hardware such as pin assignment pin functions and I O circuit type Figure 2 1 shows the 2 pin assignment MKY02 64 pins TQFP 58 SONS 6 8 2202228226 5 50 UU OU CELELELELELELELELELELELELELELE 999399299959938 BPSO TEP TECHNICA a MKY02 Ww c 10 we e JUUUUUL Q 10 100 a uuuaz gt QRREBS TXD17 11 Note Pins prefixed with are negative logic active Low Leavethe NC pin pin 28 open Fig 2 1 02 Pin Assignment SEE TECHNICA Co LTD VDD RLLD RLCK RLDT N C open CID2 CIP2 CIE2 GND COHR COD1 COP1 COE1 RXD7 RXD6 VDD TEP S TECHNICA Co LTD MKYO02 User s Manual for CUnet Table 2 1 lists the pin functions of the 2 Table 2 1 Pin Funct
28. to the cascade con nection pins CIE2 CIP2 and CID2 3 The lower priority MKYO2 transmits the packet to all ports using the signal input to the cascade con nection pins CIDI and CIHR 4 In the above operation the transmit packet data that is of an NRZ signal format is output from the cascade connection pins CODI and COD2 and its minimum pulse width is a time of 2 x TBPS The High level status signals for packet transmission control are output from the cascade connection pins COEI COPI COE2 and COP pins 5 If multiple ports receive packets simultaneously receiving from the higher priority ports is enabled and receiving from the lower priority ports is ignored 4 gt CIE1 CIP1 2 1 2 CIE1 CIP1 2 CID1 CIHR 2 CID1 CIHR 2 CID1 CIHR 2 COD2 COD2 57 fi ln 111 1 lo gt E E Port 0 Port 0 Porto amp E to Port 7 to Port 7 Port 1 to Port 7 5 Cascade with 8 reverse priority vo Port 8 to Port 10 E Port 8 Port 8 gt W Pot11 to Port 15 to Port 15 Port 12 to Port 15 Port 16 gt Port 16 4 to Port 22 Port 16 to Port 23 4 0 Port 23 to Port 23 COE1 COP1 77 CIE2 CIP2 CID2 COE1 COP1 7 CIE2 CIP2 CID2 COE1 COP1 CIE2 CIP2 CID2 COD1 COHR COD1 COHR COD1 COHR M M 2 gt Fig 4 5 Operation when Port 11 Fig 4 6 Operation when Port 23 Fig 4 7 Operation when Port 0 Receives a Packet Recei
29. values the designer needs to select an appropriate pulse trans former other than the SPT 401 series SEE TECHNICA CO LTD MKYO02 User s Manual for CUnet 3 7 Example Circuit for Single Connection of MKY02 Figure 3 16 shows an example circuit for a HUB with eight ports In the example circuit 3 6 and 12 Mbps can be set by DIP Switch DIP SW and a receive monitor circuit has been added Representative monitor for all ports Receive Not necessary if port receive say 60 x monitor circuit added LEDRZE Red 560 2 Green 3 3 Port 0 ADM1485 5V ADM1485 5V Port 7 siG 1 3 62 14 3 1 siG 22 11 shield 6 Pulse Pulse 6 shield transformer Sel transformer 6 20 Port 1 ADM1485 5V ADM1485 5V Port 6 86 11 3 6 13 3 1 516 i SIG 2 gt 6 2 SIG shield 6 Pulse a 2 Pulse 6 shield transformer B Sel transformer 4 92 20 P 2 Port 2 ADM1485 5V ADM1485 5V Port 5 SIG 1 3 7 TXES 3 SIG 4413 1 lt 22 11 341 shield 6 Pulse Pulse shield transformer Lj gt transformer 4 0 29 nt Port 3 ADM1485 5V ADM1485 5V Port 4 SIG 1 3 3 1 SIG 3 14 3 86 12 gt lt 2 sic shield 6 Pulse Pulse 6 shield transformer transformer 6 2 56 2 0 D 3 pin regulator etc Vin Vout GND 104 WI 37 16 V 100 uF EI Power 39
30. 1 pin pin 60 pin pin 59 CIDI pin pin 58 CIHR pin pin 57 CIE2 pin pin 25 CIP2 pin pin 26 and CID2 pin pin 27 at Low 2 Leave the COEI pin pin 20 COPI pin pin 21 CODI pin pin 22 COHR pin pin 23 COE2 pin pin 56 COP2 pin pin 55 and COD2 pin pin 54 open MKY02 COE2 COE1 COP2 COP1 54 cop2 COHR 60 25 S9 lcip1 ciP2 26 S8 lcip1 cip2 2 57 CIHR 777 Fig 3 15 Handling of Cascade Connection Pins 3 6 Cautions for Designing HUB When designing a HUB configured using one 2 note the following points 1 When connecting the analog signal lines to the driver receiver pulse transformer and network cable connector do not cross each other or extend the analog signal lines unncessarily except digital signal lines between the 2 and TRX components do not use overlong cables in order to avoid crosstalk interference 2 Connect a termination resistor when HUB ports are connected to the end of the network cable Do not connect a termination resistor when HUB ports are connected in the intermediate position of the network cable 3 If multiple ports receive packets simultaneously priority is given to the port with smaller port num ber In this case receiving from other ports is ignored 4 The recommended pulse transformer SPT 401 series supports 3 to 12 5 Mbps When designing a using a baud rate other than these
31. 4 1 1 Port Addition by Stacking Method To add HUB ports using multiple MKY02s HUB ICs stacking is suitable as shown in the Figure 4 1 Stacking is to connect one port to the port 0 of the next MKYO2 The connection by stacking has the following demerits 1 Time lag refer to 1 7 1 Receiving and Send ing Packets increases in subsequent stacked ports 2 One or two ports of the 2 cannot be used The increased time lag in the above 1 may be unuse ful especially for the CUnet used by a user system requiring high real timeness In addition some types of CUnet ICs used in the CUnet into which a HUB is inserted have restrictions on the stacked count the number of available ports or the number of actually insertable HUBs may not meet the user system needs W Porto W Port 1 E Port 2 Port 3 Port 4 Port 5 Port 6 Port 7 N Port 8 Port 9 Port 10 Port 11 Port 12 Port 13 Port 14 Port 15 Port 16 Port 17 Port 18 Port 19 Fig 4 1 Addition of Three stacked Ports If the MKYAO is used as a CUnet IC the number of insertable HUBs is 2 so the HUB shown in Figure 4 1 using three stacked ports cannot be used TEP ST ECHNICA CO LTD MKYO02 User s Manual for CUnet 4 1 2 Port Addition by Cascade Connection The MKY02 has cascade connection pins to solve the problems caused by stacking If more than one 02 is used the MKYO2s can be handled as if they were on
32. 4 Connecting Monitor LEDs This section describes connection of monitor LEDs 3 4 1 Packet Receive Monitor The 2 has LEDRCV pin pin 44 that outputs a Low level for a given time when any of the eight ports receives a packet When an LED that goes on at Low level is connected to this LEDRCV pin it indi cates that the HUB of the 02 is operating correctly MKY02 This LEDRCYV pin has a drive capability of 8 mA If 2 ONE AD the LED can go on even at 8 mA or less the connection LEDRCV p 4 9 Green shown in Figure 3 10 is possible In this case the hard ware designer of a HUB needs to determine the values of MKY02 Ed To test the LED the LEDRCV pin outputs a Low level for 500000 x TAXI while a hardware reset is activated When a High level is output the pin goes to 3 3 V This connection is impossible because leakage current flows current limiting resistors according to the LED rating and after the hardware reset is canceled Fig 3 10 Connection of Receive Monitor LED The Low pulse output from the LEDRCVY pin is generated by retriggerable one shot multivibrator with a minimum time of 500000 Xi 48 MHz 12 Mbps 43 69 ms 6 Mbps 87 38 ms 3 Mbps 174 76 ms Therefore if any of the eight ports receives a packet again within a given time the Low pulse width becomes wide Even if 12 Mbps is selected as the baud rate of the 2 the narrowest time width of
33. TTL Inputloutput jd 5 0 V CMOS Input 3 3V High output Fig 3 1 Connection Causing Leakage Current D gt 1 When signal connecting to LSIs with different power supply voltages be sure to check the input output electric specifications for the LSIs to connect Also a voltage must not stay supplied to signal pins when the 02 is power off 2 In the 2 if an external pull up resistor is connected between non pull up input pin and the 5 0 V power supply the voltage level rises up to 5 0 V Depending on the circuit conditions on the board with the MKYO2 several tens of us to several ms may be required for the voltage level to rise StepTechnica recommends pull up resistors of 3 to 30 be connected 3 A pull up resistor can be connected between the MKYO2 output pins and the 5 0 V power supply In this case the High level output is increased up to 3 3 V but not to 5 0 V Fig 3 1 TEP Chapter 3 Single Connection of MKY02 T ECHNICA CO LTD 3 2 Supplying Driving Clock and Hardware Reset Signal This section describes how to supply a clock that drives the MK Y02 and the hardware reset signal 3 2 1 Supplying Driving Clock Connect an oscillator generated 48 MHz clock to the Xi pin pin 34 of the MK Y02 for driving clock The specifications for supplying an external clock to the Xi pin are as follows 1 The upper frequency limit is 50 MHz and there is no lower frequency limit 2 For the ele
34. V Port 7 5 3 6 Sr 6 4 SIG shield 29 f 7 7 ADM1485 5 V Porte 3 SIG Shield 2 48 7 7 SIG 22411 hou 7 ADM1485 5 V Port 4 R 12 o 20 10 38 3 3V 104 x4 1 16 33 48 04 77 46 Oscillator 48 MHz 7 3 3 V Voo E GND 52 coc 2 21 cop 22 CID1 23 02 2 2 COE2 COP2 CID2 COD2 i Fig 4 10 Example Circuit for HUB with 24 Ports 1 3 TEP Chapter 4 Cascade Connection of MKY02 ST ECHNICA Port 8 ADM1485 5 V Error Port 8 to Port 15 45 sic 1 3 62 6 33V t M sic 2 gt 51 shield 6 Pulse 33V transformer 50 1 92 77 ADM 1485 5 V Port 15 4521 8541 Port 9 ADM1485 5 V 2 SIG 516 3 6 a Pulse 6 shield lt NI ew SIG o 20 shield Pulse transformer 92 Port 10 ADM1485 5V SIG 1 IBS SIG 2 shield 6 Pulse B transformer 6 2 ADM1485 5 V Port 14 3 1 SIG gt a Pulse 6 shield lt transformer 29 ADM1485 5 V Port 13 12 1 516 42 Port 11 ADM1485 5 V 2 sic 916 1 3 Pulse 6 shield MITES Tm 5 2 gt 20 2 2 shield 6 Pulse 2 n transformer RXD3 c ds ADM1485 5 V Port 12 NM 7 7 l
35. al Characteristics in Circuit Types of 02 Chapter 3 Single Connection of MKY02 This chapter describes the pin functions and how to connect pins required to design a HUB with two to eight ports configured using one MK Y02 inserted into the CUnet 3 1 3 2 3 3 3 4 3 5 3 6 3 7 Voltage Levels of Pins Connecting to Signal Pins 3 4 Supplying Driving Clock and Hardware Reset Signal 3 5 Connecting Network 3 8 Connecting Monitor 3 11 Handling Cascade Connection Pins 3 15 Cautions for Designing HUB nnmnnn 3 15 Example Circuit for Single Connection of MKY02 3 16 TEP Chapter 3 Single Connection of MKY02 ST ECHNICA CO LTD Chapter 3 Single Connection of MKY02 This chapter describes the pin functions and how to connect pins required to design a HUB with two to eight ports configured using one MKY02 inserted into the CUnet Before connecting the 2 be sure to connect the TESTI pin pin 46 and TEST2 pin pin 47 to the GND pins In a HUB configured using one MKYO 2 to be inserted into the CUnet be sure to fix the function select pin HC pin 50 at Low Be sure to connect all GND
36. as one unit The 02 stores the status of the port that has received a packet for a time of 217 x TAXI The 02 outputs the stored status to the RLDT pin as the signal format shown in Figure 3 12 for a next time of 217 x TAXI Passage of time 12 Mbps 10 92 ms 6 Mbps 21 85 ms Monitor status updating interval 217 x Taxi 3 Mbps aod md 12 Mbps 2 73 ms 15 6 Mbps 5 46 ms 29xTa1 4 3 Mbps 10 92 ms Data for LED output P7 X P6 X P5 Duty 50 while RLLD at Low level RLCK at Low level while RLLD at High level RLLD 12 Mbps 341 33 us 2 93 kHz 6 Mbps 682 67 us 5 86 kHz 3 Mbps 1 37 ms 11 72 kHz TRLDS min 211 1 x TAX1 TRLDH min 211 1 x TAX1 Fig 3 12 RLLD RLDT and RLCK Outputs As shown in Figure 3 13 adding an 8 bit shift register and 8 bit latch enables to add port receive monitors corresponding to individual ports Figure 3 14 gives an example of the additional circuit for a HUB with four ports when eight ports are not used When the MKYO 2 is inserted into CUnet that operates correctly and continuously several cycles of pack ets are transmitted and received for a time of 217 x TAXI Therefore the receive monitors corresponding to the ports connected to the user equipment may always be on TEP ST ECHNICA MKYO02 User s Manual for CUnet The hardware designer of a HUB needs to determine the port receive monito
37. ca Co Ltd 757 3 Shimo fujisawa Iruma shi Saitama 358 0011 TEL 04 2964 8804 FAX 04 2964 7653 http www steptechnica com info steptechnica com HUB IC MKYO2 User s Manual for CUnet Document No STD CUH02 V1 4E Issued September 2008
38. clock to the MKY02 Fig 3 3 Clock Connection Xi pin Table 3 1 Output Frequencies of Cascade Clocks 1 pin BPSO pin 0 AXS1 pin AXS2 pin i i 12 Mbps 6 MHz 6 Mbps 3 MHz 3 Mbps 1 5 MHz 1 5 Mbps 750 kHz Reference The configuration to input cascade clocks output from the pins of the 2 to the pins of the 2 again enables cascade connection of the 02 described in Chapter 4 Cascade Connection of MKY02 To design the HUB with two to eight ports config ured using one MKY02 connect the output signals as shown in Figure 3 3 TEP Chapter 3 Single Connection of MKY02 ST ECHNICA CO LTD 3 2 3 Hardware Reset When a Low level signal is input to the RST ReSeT pin pin 35 the MKYO2 is hardware reset If a period in which the Low level signal has been input is less than one clock of the cascade clock the signal is ignored to prevent a malfunction To reset the 2 completely the RST pin must be kept Low for 10 clocks of the cascade clock or more while supplying a cascade clock to the pin Fig 3 4 P NN UM RST No reaction to pulse Must be kept Low for 10 or more clocks with less than 1 clock _ Fig 3 4 Hardware Reset D gt 7 Caution Design the circuit so that a hardware reset is surely activated immediately after MKY02 power on
39. ctrical specifications of the Xi pin refer to Chapter 2 MKY02 Hardware 3 Connect a clock with a signal rise and fall time of 20 ns or less 4 Connect a clock with a minimum High level or Low level time of 5 ns or more 5 Connect a clock with a jitter component of e 250 ps or less at input frequency of 25 MHz or more e 500 ps or less at input frequency of less than 25 MHz 6 Connect a clock with a frequency accuracy of 200 ppm or better TEP S TECHNICA Co LTD MKYO02 User s Manual for CUnet 3 2 2 Setting Cascade Clock and Baud Rate The 2 uses three cascade clocks AXI and AX2 It has three cascade clock output pins 50 AXSI and AXS2 Fig 3 2 A cascade clock is generated from the external clock supplied to the Xi pin based on a division ratio determined by the settings of the BPSO and BPS1 pins HUB Function core BPS1 BPSO Xi Cascade clock generator Fig 3 2 Cascade Clock Generation Conform the settings of the BPSO pin 52 and BPS1 pin 53 pins to the baud rates of the CUnet into which the HUB is inserted To use a cascade clock connect the output signal of the AXSO pin to the pin of the AXSI pin to the AXI pin and of the AXS2 pin to the AX2 pin as shown in Figure 3 3 Table 3 1 shows the output frequencies of cascade clocks from the 50 AXS1 and AXS2 pins corresponding to the settings of the BPSO and BPS1 pins when connecting a 48 MHz external
40. e HUB IC by connecting the cascade connection pins Fig 4 2 If multiple MKYO2s are cascade connected the time lag from receiving to sending packets described in 1 7 1 Receiving and Sending Packets is consistent across any port and the HUB is identical to the HUB designed using one 02 gt CIE1 CIP1 plan CID1 CIHR 9 Port 0 1 9 Handled as one HUB IC Port 1 with 24 ports 8 ports x 3 Port 2 Port2 Puto ort s a Port 3 3 3 3 Port 1 Pott Port 4 N NPot5 Port 2 COE1 COP1 COD1 COHR N bois Pots ports N Port 6 CIE2 CIP2 CID2 Pony Pot4 E Signal connection between Ports COE2 COP2 COD2 cascade connection pins Port 6 Port 0 Port 7 CIE1 CIP1 CID1 CIHR palis Ports ema Port 9 Port 8 Port 2 2 4 10 Port 9 pa ME 3 Port 11 Port 10 Port 12 Port 11 X Port 5 B Port 13 Port 12 COE1 COP1 COD1 COHR Port 6 M Port 14 Port 13 CIE2 CIP2 CID2 Port 7 8 Patis Port 14 Port 15 COE2 COP2 COD2 Port 0 Port 16 Port 16 CIE1 CIP1 CID1 CIHR Port 1 Port 17 N Port 17 Port 2 Port 18 E Port 18 ane P 1 aon EN Port 19 ui Port 4 Port 20 Port 20 5 B Pot 21 Port 21 1 N Port 6 E Port 22 Port 22 COE1 COP1 Port 23 Port 23 COD1 COHR CIE2 CIP2 CID2 V 2 Fig 4 2 Port Addition by Three Cascade Connections 4 1 3 Maximum Available Cascade Connections When configuring a HUB for CUnet up to 8
41. escribed in 3 4 1 Packet Receive Monitor and the packet GERMEN error monitor described in 3 4 2 Packet Error Monitor function only when they receive packets from the input pins RXDO RXD7 of each port These monitors do not function for packets passing through the priority cascade connection signals and reverse priority cascade connection signals described in 4 2 2 Operation of Cascade Connection Pins Therefore in the port added HUB by cascade connecting the 2 place the packet receive monitor and packet error monitor by the number of MK YO2 to be used SEE TECHNICA CO LTD MKYO02 User s Manual for CUnet 4 3 Example Circuit for Port added HUB by Cascade Connection Figure 4 10 shows a example circuit for a HUB with 24 ports with a baud rate of 3 6 and 12 Mbps set by a DIP SW Port 0 ADM1485 5 V 23 SIG 1 3 62 Ina 5 516 2 shield 6 Pulse 72 transformer 5 4 6 gt Port 1 ADM1485 5 V SIG 1 3 6 50 2 shield 6 Pulse transformer Lie 4 6 Port 2 ADM1485 5 V 3 5 1 7 Rt SiG 2 shield 6 Pulse transformer Port 3 ADM1485 5 V SIG 3 SIG az shield Pulse transformer 946 Port receive monitor circuit jc CIP1 Voltage detection reset IC etc A Low level is output at reset 77 56 55 33V 54 Voo OUT 104 GND Mi Error Port 0 to Port 7 4 ee 33
42. g HUBs to the CUnet the user can connect HUBs as multi drop Fig 1 8 The multi drop network of HUBs is suitable for a user system in which the network cables should be divided The number of inserted HUBs shown in Figure 1 8 is 2 As shown in Figure 1 8 in cases where port 0 of the HUB is placed in the intermediate position the halfway position in the network cable of a multi drop network do not connect a termination resistor to the port 0 For details of the connection of a termination resistor refer to CUnet Technical Guide gt To Port 0 Port 0 Do not connect a termination resistor CUnet IC Rt La 667 Ports 1 to 7 Connect a termination resistor Vaor equipment Rt 4 RM RA RR Multi drop network of user equipment Rt CUnet IC CUnet IC CUnet IC CUnet IC CUnet IC CUnet IC CUnet IC User equipment User equipment User equipment User equipment User equipment User equipment User equipment Multi drop network of user equipment Port 0 HUB 1234567 Port 0 Do not connect a termination resistor Ports 1 to 7 Connect a termination resistor Rt RP Multi drop network of user equipment Rt CUnet IC CUnet IC CUnet IC User equipment User equipment User equipment User equipment User equipment User equipment Multi drop network of user equipment HUB 7 Port 0 Do not connect a termination resistor Ports 1 to 7 Connect a termination resistor Port 0 1 2 9 4 5 8 R
43. ions of MKY02 Input pins that input packets 2105 Positive Connect to output pins target port receivers When multiple ports input signals simul 15 18 19 taneously priority is given to pins with smaller port number Fix these pins at High or Low when not in use These pins go High when ports are enabled for sending Positive Connect to gate pins of target port drivers Leave these pins open when not in use TXE1 to 6109 TXE7 12to 14 Output pin that outputs packets to ports 1 to 7 TXD17 11 Positive Connect to input pins of port 1 to 7 drivers Output pin for cascade connection Positive Connect to the pin of the MK Y02 for lower cascade connection Leave this pin open when it is not cascade connected Output pin for cascade connection Positive Connect to the CIP1 pin of the 2 for lower cascade connection Leave this pin open when is not cascade connected Output pin for cascade connection Positive Connect to the pin of the MK Y02 for lower cascade connection Leave this pin open when is not cascade connected Output pin for cascade connection Positive Connect to the CIHR pin of the MK Y02 for lower cascade connection Leave this pin open when is not cascade connected Input pin for cascade connection Positive Connect to the COE2 pin of the 02 for lower cascade connection Fix this pin at Low when is not cascade connected Input pin for cascade connection P
44. l Pins 3 4 3 2 Supplying Driving Clock and Hardware Reset Signal 3 5 3 2 1 Supplying Driving 3 5 3 2 2 Setting Cascade Clock and Baud Rate esee 3 6 3 23 FlardWare uut 3 7 3 3 Connecting Network Interface 3 8 3 941 Handling ot 22222 5 3 8 3 3 2 Connection of POF aceata citata otita iii 3 8 3 3 3 Connection of Ports 110 7 3 9 3 3 4 Recommended Network 3 10 3 4 Connecting Monitor LEDS eee esi ed 3 11 3 4 4 Packet Receive 3 11 3 4 2 Packet Error iesi cea En tico saca aci 3 12 3 4 3 Port Receive 3 13 3 5 Handling Cascade Connection Pins eese 3 15 3 6 Cautions for Designing 3 15 3 7 Example Circuit for Single Connection of 02
45. multivibrator with a minimum time of 500000 TAX1 Xi 48 MHz 12 Mbps 43 69 ms 6 Mbps 87 38 ms 3 Mbps 174 76 ms Therefore if any of the eight ports receives an error packet again within a given time the Low pulse width becomes wide Even if 12 Mbps is selected as the baud rate of the 2 the narrowest time of the Low pulse is about 43 69 ms and the user can find that the LED is lit The red LED to indicating an error should be connected to the LEDRZE pin When not used leave this pin open The 4LEDRZE pin may cause the LED to go on the following cases If the cable con nected to the HUB is near its length limit If impedance mismatch occurs in network cables If there is interference including external noise to external the system Or if an error occurs in user equipment with CUnet ICs StepTechnica recommends the user put the LED where the user can check the LED indicator on the HUB easily TEP Chapter 3 Single Connection of MKY02 ST ECHNICA CO LTD 3 4 3 Port Receive Monitor The 2 has three output pins RLDT RLCK RLLD that can be used to add more port receive moni tors corresponding to individual ports The RLDT pin pin 29 RLCK pin pin 30 and RLLD pin pin 31 operate as follows 1 If a hardware reset is activated all of the pins output a Low level 2 If a hardware reset is not activated all of the pins output the signals shown in Figure 3 12 using a time of 217 x TAXI
46. n for cascade connection Positive Connect to the CID2 pin of the MK Y02 for higher cascade connection Leave this pin open when it is not cascade connected Output pin for cascade connection Positive Connect to the CIP2 pin of the 2 for higher cascade connection Leave this pin open when it is not cascade connected Output pin for cascade connection Positive Connect to the CIE2 pin of the 2 for higher cascade connection Leave this pin open when it is not cascade connected Input pin for cascade connection Positive Connect to pin of the 2 for higher cascade connection Fix this pin at Low when it is not cascade connected Input pin for cascade connection Positive Connect to the CODI pin of the 02 for higher cascade connection Fix this pin at Low when it is not cascade connected Input pin for cascade connection Positive Connect to the COPI pin of the MK Y02 for higher cascade connection Fix this pin at Low when it is not cascade connected Input pin for cascade connection Positive Connect to the COEI pin of the 2 for higher cascade connection Fix this pin at Low when it is not cascade connected Input pin that inputs packet from port 0 61 Positive Mes ET 5 Connect this pin to output pin including receiver etc This pin goes High when sending to port 0 is enabled 62 Positive TM e 24 Connect this pin to gate pin including driver etc Output pin
47. nciples Passage of time PP Most of communication HUBs other than StepTechnica s are designed to start sending after eee ee receiving the full packet length This mechanism decreases the signal response speed of the entire system significantly in particular in a system with inserted a lot of HUBs As shown in Figure 1 11 the 02 sends the corrected packet while receiving the packet which causes only a slight decrease in the signal response speed of the entire system In a CUnet that operates correctly multiple CUnet ICs never send packets simultaneously Therefore a packet collision like that shown in Figure 1 11 never occur in a CUnet that operates correctly 1 13 SEE TECHNICA CO LTD MKYO02 User s Manual for CUnet 1 7 2 Signal Correction To lengthen the total extension of a network cable in general a buffer is inserted to amplify signals When the baud rate is relatively low buffer insertion is practical However when the baud rate is high fast buffer insertion is impractical because signals transformed by signal propagation along network cables cannot be corrected even if they are amplified The CUnet uses a RZ signal format for signals constituting a packet Even if the signal format of the received packet is transformed up to 49 the MK Y02 which is a kind of HUB IC that can be inserted into the CUnet network corrects the packet into a RZ signal format to send it Fig 1 12 Theref
48. nction to connect various monitor LEDs refert to 3 4 Connecting Monitor LEDs In the port added HUB by cascade connecting multiple 025 depending on the placement of monitor LEDs the level of convenience increases in user system installation network cable setup and vari ous maintenance works refer to Fig 4 9 Port added HUB by cascade connecting three MKY02s Port Function of first 0 1 2 3 4 5 6 7 highest priority 02 e E 8 9 10 11 12 13 14 15 Function of second oH om cascade connected MKY02 16 17 18 19 20 21 22 23 Function of third cascade connected MKY02 Port connector Port receive monitor green Packet error monitor red as representative of row port which one 2 serves Fig 4 9 Monitor Placement Example for Port added HUB StepTechnica recommends monitor LEDs be placed as follows 1 Place the port receive monitor LED beside each port connector Fig 4 9 For details of the port receive monitor refer to 3 4 3 Port Receive Monitor 2 Place the packet error monitor LED as a representative of the port which one 2 serves by the number of 2 to be used Fig 4 9 For details of the packet error monitor refer to 3 4 2 Packet Error Monitor The user who designs a HUB needs to determine the placement of monitor LEDs i The packet receive monitor d
49. ng the CUnet to connect ports and terminals one on one makes it easy to use fiber optic cables TEP ECHNICA CO LTD T c 2 User s Manual for CUnet 1 4 Basic HUB Connection Figure 1 7 shows the basic connection of HUBs added to a CUnet network The user must know the number of HUBs to be added in the route of all routes that pass most frequently through the HUB The number of added HUBs is called the number of inserted HUBs The number of inserted HUBs is determined by the type of the CUnet IC and settings made to CUnet ICs by the user system There are no restrictions on which device must be connected to which port etc at HUB connection N When two HUBs are inserted HUB User equipment User equipment When three HUBs are inserted User equipment User equipment User equipment User equipment User equipment User equipment Fig 1 7 Basic Connection and Number of Inserted HUBs 5 7 Caution In a system using the MKY40 as a CUnet IC the user can add up to two HUBs The exam ple in which three HUBs are used in Figure 1 7 cannot be applied to a system using the 40 as a CUnet IC For details on each of CUnet ICs refer to each of User s Man ual for the CUnet IC TEP Chapter 1 Concepts for Using MKY02 HUB SIFECHNICA 1 5 Multi drop Network of HUBs When addin
50. ore in a system in which a signal propagates via multiple HUBs the user can extend the network cable length by the num ber of inserted 1 without cumulative signal transformation refer to 1 3 1 Extending Total Length of Network Cable RZ 1 RZ 1 RZ 0 RZ 0 RZ 1 RZ 1 Signal of transmitting pin Receiver input signal transformed by transmission Signal of receiver __ Se us output pin RZ 1 RZ 1 RZ 0 RZ 0 RZ 1 RZ 1 Corrected transmitting pin Passage of time Fig 1 12 Example of Signal Transformation and Correction 1 7 3 Detection of Error Packet If the signal transformation of the received packet exceeds 49 the 2 recognizes the packet as an error packet If the 2 detects an error in the received packet during sending the MK Y02 immediately stops sending to prevent improper correction and prevent the error packet from passing When the 2 detects an error packet it outputs pulses to the LEDRZE pin for a given time and notifies the user Generally the main causes for detection of an error packet are as follows 1 A user equipment with CUnet ICs was disconnected system failure or the network cables were con nected or disconnected 2 The packet format was damaged by external noise and improper environments 3 The network performance reached the limit 4 Improper setup of the system or cables including overlap of the station address SA or
51. ositive Connect to the COP2 pin of the 2 for lower cascade connection Fix this pin at Low when it is not cascade connected Input pin for cascade connection Positive Connect to COD2 pin of the MK Y02 for lower cascade connection Fix this pin at Low when is not cascade connected Positive Be sure to leave this pin open Data signal output pin for receive monitor LED drive circuit of individual port Positive D AW Leave this pin open when it is not used Data clock output pin for receiving monitor LED drive circuit of individual port Positive TOS Leave this pin open when it is not used Data load signal output pin for receiving monitor LED drive circuit of individual port Positive Sas Leave this pin open when it is not used Positive External clock input pin 48 MHz recommended MKY02 hardware reset input pin Negative Keep this pin Low for 10 or more clocks of the clock to be input to the pin immediately after power on or when resetting hardware intentionally Cascade clock output pin Positive For details refer to 3 2 2 Setting Cascade Clock and Baud Rate Cascade clock input pin BE For details refer to 3 2 2 Setting Cascade Clock and Baud Rate Cascade clock input pin Positi gee For details refer to 3 2 2 Setting Cascade Clock and Baud Rate Cascade clock output pin positive For details refer to 3 2 2 Setting Cascade Clock and Baud Rate
52. pin input current 6 to 6 Peak output current Allowable power dissipation Peak 20 345 Operating temperature 40 to 85 Storage temperature 65 to 150 Table 5 2 lists the electrical ratings of the 2 Table 5 2 Electrical Ratings Operating power supply voltage 25 Vss 0V Mean operating current Vi VDD or Vss 50 MHz 50 MHz output open Mean operating current operating at 6 Mbps Vi VDD or Vss 48 MHz 24 MHz output open Mean operating current operating at 3 Mbps Vi VDD or Vss 48 MHz 12 MHz output open External input frequency Input to Xi pin Input pin capacitance Output pin capacitance I O pin capacitance Vi 0V f 1 MHz 25 C Rise fall time of input signal Rise fall time of input signal 5 2 AC Characteristics Schmitt trigger input Table 5 3 lists the measurement conditions for AC characteristics of the MK Y02 Table 5 3 AC Characteristics Measurement Conditions Output load capacitance Power supply voltage Temperature TEP ST ECHNICA MKYO02 User s Manual for CUnet 5 2 1 Clock and Reset Timing TXI Passage of time Xi TXIL 50 51 52 52 TRsT AXO AXSO RST Clock period width Clock High level width Clock Low level width
53. r LEDs for individual ports and the values of current limiting resistors shown in Figures 3 13 and 3 14 to meet the output specifications for added latches The green LED indicating stability should be connected as a port receive monitor LED Pot7 Port6 5 4 Port3 Por2 Port1 Port 0 777 07 07 06 05 05 04 04 Q3 02 02 Q1 01 QO CLK 74273 3 3 V type etc CLR DD4 RST Fig 3 13 8 port Receive Monitor Pot3 Port2 Por1 Porto RLLD 74273 3 3 V type etc 07 06 05 04 D3 02 RST Q3 03 Q2 02 01 D1 00 CLK RLCK 74273 3 3 V type etc DO 4 RLDT D7 D6 D5 D4 RST Fig 3 14 4 port Receive Monitor Leave the RLDT pin RLCK pin and RLLD pin open when an additional circuit is not connected to them Reference Packet Receive Monitor also go on Mounting both LEDs may cause confusion among If any of the receive monitor LEDs for individual ports go on the LEDs described in 3 4 1 the HUB users The HUB designer or user system designer needs to determine the mount ing of receive monitors 8 14 TEP Chapter 3 Single Connection of MKY02 ST ECHNICA CO LTD 3 5 Handling Cascade Connection Pins When designing HUB with two to eight ports configured using one 2 be sure to perform the fol lowing processing so that the cascade pins of the MK YO2 do not function Fig 3 15 1 Fix the
54. s helpful to setup cables on multi drop network or star topology For details of cascading 025 refer to Chapter 4 Cascade Connection of MKY02 Chapter 1 Concepts for Using MKY02 HUB 1 7 MKYO 2 Operation SEE TECHNICA Co LTD This section describes the operation of the 2 Be sure to read this section before adding HUBs to the CUnet 1 7 1 Receiving and Sending Packets When the MKY02 receives a packet from any port it corrects the signal constituting the received packet into a complete format and sends it to all other ports resulting in a maximum time lag of 46 x TBPS from receiving to sending packet to correct the received packet into a complete format Fig 1 11 Each port of the 2 has priorities based on the port number When multiple ports receive packets simultaneously the MKYO2 starts operation in ascending order of the port numbers Fig 1 11 Operation when port 3 receives packet Port 0 send Port 1 send Port 2 send E Port 3 receive Port 4 send Port 5 send Port 6 send Port 7 send 46 x TBPS max Packet Operation when ports 2 and 7 receive packets simultaneously Port 0 send Port 1 send Port 2 receive Port 3 send Port 4 send Port 5 send Port 6 send Port 7 receive If the ports receive packets simultaneously priority is given to the small port number Port 7 send 46 x TBPS max Fig 1 11 02 Operating Pri
55. t Rt REX Multi drop network of user equipment Rt a c o c c 8 CUnet IC CUnet IC CUnet IC CUnet IC CUnet IC CUnet IC c User equipment User equipment User equipment User equipment User equipment User equipment CUnet IC User equipment Multi drop network of user equipment Fig 1 8 HUB in Intermediate Position of Multi drop Network 1 41 EP T ST ECHNICA CO LTD MKYO02 User s Manual for CUnet 1 6 Port Addition to HUB By cascading MKY02s the user can add more ports to a HUB composed of the MKY02 For example a cascade connection of three 25 enables the HUB to have 24 ports 8 ports x 3 Fig 1 9 C N HUB where 24 ports added by cascade connecting three MKY02s Function of first MKY02 12 Function of second cascade connected MKY02 1 Function of third cascade connected MKY02 S 2 Fig 1 9 Adding Ports by Cascading MKY02s If a HUB with ports added by cascading MKYO2s is added to a network the number of inserted HUBs between user equipments connected to each port of the HUB is 1 Fig 1 10 In this configuration the inserted count of HUBs User equipment viewed from all user equipment is 1 HUB with 24 ports added by cascading three MKY02s All ports with Rt Usar aduipmant User equipment User equipment Fig 1 10 Number of Inserted HUBs with Added Ports Adding ports by cascading 2 i
56. that outputs packet to port 0 63 Positive RU Connect this pin to driver input pin 10 17 32 38 49 64 1 16 24 33 41 48 Power pins for 3 3 V supply Power pins connected to OV Note Pins prefixed with are negative logic active Low TEP ST ECHNICA MKYO02 User s Manual for CUnet Table 2 2 and Figure 2 2 shows the electrical ratings of the 2 pins Table 2 2 Electrical Ratings of MKY02 8 Negative logic GND X RST AXSO VDD AX1 AXS1 GND AXS2 AX2 ZLEDRCV LEDRZE TEST1 TEST2 GND oO 01 O 0 0 0 0 gt gt gt gt 01 1 1 1 1 0 10 101 1 1 1 gt gt gt gt gt 0 0 5 0 V tolerant input Schmitt trigger for TTL level input 5 0 V tolerant pull up input Type A Schmitt trigger for TTL level input Type B Vt max Vt min AVt min 5 5 V max 250 RputypSOKO 170 Type D 5 0 V tolerant push pull output 100 uA 0 2 flow 100 uA min opo V Von 4 mA min 2 35 TTE 8 mA min Vo lot 100 uA max Vo lo 100 uA max Vo 4 mA max Vo 8 mA max loH max lo max 0 70 T Fig 2 2 Pin Electric
57. the Low pulse is about 43 69 ms and the user can find that the LED is lit The green LED indicating stability should be connected to the LEDRCV pin When not used leave this pin open i If the MKYO2 is inserted into an CUnet that operates correctly and continuously the a D LEDRCYV pin outputs a Low level concecutively TEP S TECHNICA Co LTD MKYO02 User s Manual for CUnet 3 4 2 Packet Error Monitor The MKY02 has a LEDRZE pin pin 45 that outputs a Low level for a given time when any port receives an error packet When an LED that goes on at Low level is connected to this LEDRZE pin it indicates that any port of the 2 has received an error packet MKY02 This LEDRZE pin has a drive capability of 8 mA If the LED can go on even at 8 mA or less the connec 560 Approx 4 mA 33V 45 LEDRZE p tion in Figure 3 11 is possible In this case the hard ware designer of a HUB needs to determine the values MKY02 of current limiting resistors according to the LED rat ing LEDRZE 5 0V To test the LED the LEDRZE pin outputs a Low When a High level is output the pin goes to 3 3 V level for 500000 x TAXI while a hardware reset is This connection is impossible because leakage current flows activated and after the hardware reset is canceled Fig 3 11 Connection of Packet Error Monitor LED The Low pulse output from the LEDRZE pin is generated by a retriggerable one shot
58. ture resin surface Tp 255 C max 380 C max Peak temperature holding time tp 10 s max 5 s max CSS T Caution 1 Product storage conditions 40 max RH 85 for prevention of moisture absorption 2 Manual soldering Temperature of the tip of soldering iron 380 C 5 s max Device lead temperature 260 C 10 s max package surface temperature 150 C 3 Reflow Twice max 4 Flux Non chlorine flux should be cleaned sufficiently 5 Ultrasonic cleaning Depending on frequencies and circuit board shapes ultrasonic cleaning may cause resonance affecting lead strength 5 5 Recommended Reflow Conditions 5 Package surface temperature Parameter Pre heat time 60 to 80 s Pre heat temperature 150 to 190 Temperature rise rate 1 to 4 C s Peak condition time 10 s max Peak condition temperature 255 Cooling rate to 1 5 C s Cooling rate to 0 5 C s High temperature area 220 60 s max Removal temperature lt 100 C Sus T Caution The recommended conditions apply to hot air reflow or infrared reflow Temperature indi cates resin surface temperature of the package B North America Distributor Trans Data Technologies Inc 340 Arthur Ave Roselle IL 60172 Telephone 630 440 4075 Facsimile 630 539 4475 e mail info steptechnica us http www steptechnica us Developed and manufactured by StepTechni
59. ut Network Fig 3 6 TRX Connection of Port 0 EP T Chapter 3 Single Connection of MKY02 ST ECHNICA CO LTD 3 3 3 Connection of Ports 1 to 7 Connect the output signals of the TXD17 pin to the driver input pins of the TRX driver receiver compo nents connected to ports 1 to 7 Connect the output signals of the transmit enable pins TXE1 to TXE7 of the MK Y02 to the driver enable input pins of the TRX connected to ports 1 to 7 Connect the receiver out put signals of the TRX to the input pins RXD1 to RXD7 of the 2 Fig 3 7 When using selected ports in the HUB use the ports in the order of lowest to highest port number In this case fix the input pins RXDn of unused ports at High or Low and leave the transmit enable pins open Fig 3 8 Port 1 TRX Driver input Driver enable Receiver output Port 2 TRX Driver input Driver enable Receiver output Port 3 TRX Driver input Driver enable Receiver output Port 4 TRX Driver input Driver enable Receiver output Port 5 TRX Driver input Driver enable Receiver output Port 6 TRX Driver input Driver enable Receiver output Port 7 TRX Driver input Driver enable Receiver output Fig 3 7 TRX Connection of Ports 1 to 7 Port 0 TRX Driver input Driver enable Receiver output Port 1 TRX Driver input Driver enable Receiver output Port 2 TRX Driver input Driver enable Receiver output Port 3 TRX Driver inp
60. ut Driver enable Receiver output Fig 3 8 TRX Connection of HUB with 4 Ports EP T ST ECHNICA MKYO02 User s Manual for CUnet 3 3 4 Recommended Network Connection Figure 3 9 shows a recommended network connection The TRX driver receiver components consists of an RS 485 driver receiver LSI driven at 5 0 V and a pulse transformer Recommended network cables include Ethernet LAN network cables IOBASE T Category 3 or higher and shielded network cables Since the CUnet operates in half duplex mode one twisted pair is used When HUB ports are connected at the end of the network cable connect a termination resistor When HUB ports are connected in the intermediate position of the network cable do not connect a termina tion resistor Network cable 3 One twisted pair cable with impedance of 100 Q Connect 100 termination resistor to the end of the network cables Connecting the resistor before or after the pulse transformer has the same effect Pulse transformer Fig 3 9 Recommended Network Connection Reference CEP IDE E described in CUnet Technical Guide For more information about how to select com Background information to help build a netwok and details of termination resistor are ponents or to get recommended components visit our Web site at http www steptechnica com 3 10 TEP Chapter 3 Single Connection of MKY02 ST ECHNICA CO LTD 3
61. ves a Packet Receives a Packet TEP Chapter 4 Cascade Connection of MKY02 ST ECHNICA LTD 4 2 3 Connection of Cascade Clocks and Determination of Baud Rate The 2 has a circuit which generates a cascade clock A cascade clock for a baud rate suitable for the settings of the BPS1 and BPSO pins from the clock to be input to the Xi pin refer to 3 2 2 Setting Cas cade Clock and Baud Rate When multiple MK Y02s are is cascade connected for use the cascade clock generated by the highest prior ity MKYO2 is supplied to another 02 Fig 4 8 The baud rate set for the highest priority 2 also applies to another 2 Handle any 2 other than the highest priority one as follows Fig 4 8 1 Fix the Xi pin pin 34 at a Low level or a High level when left open this pin can be fixed at a High level due to an internal pull up resistor 2 Fix the BPSO pin pin 52 and BPS1 pin 53 pin at a Low level or a High level when left open these pins can be fixed at a High level due to an internal pull up resistor 3 Leave the AXSO pin pin 36 AXSI pin pin 40 and AXS2 pin pin 42 pin open di Open Fix at High level or Low level or leave open Boud rate setting MKY02 1 DIP SW etc Oscillator 48 MHz 3 3 V 104 us OUT e ND Voltage detection IC etc Low level at reset Fig 4 8 Connection of Cascade Clocks D gt In phase

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