Emerald-MM-8Plus User Manual
Contents
1. etUm em De Men e MM 18 Serial Fort Operation 20 Line FermunetOLi dei needed iaa dpa A 20 Serial Poss see too E LE qua 22 ISO cA 22 2 lt PETRO tabi ad 22 Figures Figure 1 EMM 8Plus Functional Block 5 Figure 2 EMM 8Plus Board LEayOUul nr rtt ehe ie eee rn pur 6 Figure 104 ISA Bus Connectors 41 2 eei dr dre dne reri ueni 8 Figure 4 PC 104 Plus PCI Connector 43 9 Figure 5 I O Header Connectors 4 5 10 Figure 6 RS 232 Protocol Selection eeeee eene 16 Figure 7 RS 422 Protocol Selection Options eee ene ente 16 Diamond Systems Corporation Emerald MM 8Plus User Manual Page 2 Figure 8 RS 485 Protocol Selection 17 Figure 9 PCI Slot ID Selection 18 Figure 10 Line Termination eese 20 Diamond Systems Corporation Emerald MM 8Plus User Manual Page 3 Introduction Emerald MM 8Plus is a PC 104 Plus module with four or eight serial ports connected through the PCI bus Each port supports RS 232 RS 422 RS 485 and 5V TTL interfaces using jumper configuration The board also has eig2. 3 23 24 TXD 3 TXD 7 TXD 7 25 26 RXD 3 NC RXD 7 RXD 3 27 28 RXD 7 NC GND 29 30 DIO2 GND DIO6 Port4 NC 31 32 NC Port8 NC NC TXD 4 33 34 TXD 4 TXD 8 TXD 8 35 36 RXD 4 RXD 8 RXD 4 37 38 RXD 8 NC GND 39 40 DIO3 GND DIO7 Signal Definition DE 9 Pin Direction TXD n TXD n Differential transmit data pin 2 pin 7 Output RXD n RXD n Differential receive data pin 4 pin 8 Input GND Ground pin 5 Signal Ground NC not connected DIOn Digital Separate lines Diamond Systems Corporation Emerald MM 8Plus User Manual Page 13 Digital and Counter timer Connector Connector J15 is a 1x10 single row right angle connector that provides the following digital I O and counter timer signals CN DIO7 DIO5 DIO3 DIO1 Counter timer In DIO 6 DIO 4 DIO 2 o A A WwW N DIO O Counter timer Out LED Out GND EN Signal Definition DIO 0 7 Digital I O programmable direction Counter timer In input Counter timer Out Counter timer output LED Out User defined LED typically for board status GND Ground The DIO Counter connector J15 provides access to 8 UART DIO lines These same lines are available on the port connectors J4 and J5 Users should be aware that the DIO on the serial port connectors and J15 are the same line Diamond Systems Corporation Emerald MM 8Plus User Manual Pa
3. DIAMOND SYSTEMS CORPORATION Emerald MM 8Plus PC 104 Plus 8 Port Multi Protocol Serial Port Module 9119 21111109111 5 7 1 9 t User Manual v1 04 Copyright 2006 1255 Terra Bella Ave Mountain View CA 94043 Tel 650 810 2500 Fax 650 810 2525 www diamondsystems com Diamond Systems Corporation Emerald MM 8Plus User Manual Page 1 Table of Contents Description aNd F eA ES d aree det gre OE 4 Block Diagram TTE 5 NETTE 6 3 2 Va 7 J rmper SUI ANY mE LU LM EM ae 7 D M eee 8 4 5 PC Buse p 9 O Header Gonriectots oed ees c ota ee ede 10 R5 232 Pin Assignment ident orco d deed 11 REL RLNW Cini me M 12 54122 Pin Assignmienl rro e ient dene pP DH idee ce ee E etre ace 13 Digital I O and Counter timer 14 Serial Protocol SelB lots senescere opi axe hase eve UM uS a 15 5 232 5 16 RS 422 Sel cti n 16 5 485 5 ees 17 PCI SIOLID Selection
4. TXTERM TXBIAS RXBIAS RXBIAS T 56 T o T T B B B E B R amp R 66 R R R 1 o o 1 o 1 2 o ol 2 o 91 2 E Diamond Systems Corporation Emerald MM 8Plus User Manual Page 16 RS 485 Selection Figure 8 shows the J7 through J14 jumper settings to select the RS 485 protocol options Figure 8 RS 485 Protocol Selection Options NOECHO ECHO NOECHO TERM ECHO TERM NOECHO TERM BIAS TERM BIAS T T 0 8 B o 0 8 o B R R R R 1 ool 1 2 2 2 o o 2 2 E OF Diamond Systems Corporation Emerald MM 8Plus User Manual Page 17 PCI Slot ID Selection Jumper block J6 sets the PCI slot ID using two jumpers as shown in Figure 9 Take care in selecting the correct PCI slot to avoid resource conflicts in the software driver Figure 9 PCI Slot ID Selection Jumper Slot 1 Slot 2 Slot 3 Slot 4 Diamond Systems Corporation Emerald MM 8Plus User Manual Page 18 Map The Emerald MM 8Plus contains eight registers for controlling board functions and 18 registers for configuring the serial I O ports Emerald MM 8Plus Registers The following table describes the basic Emerald MM 8Plus registers Base Write Read 0 Address pointer enable register
5. Address pointer enable register Address IRQ no Data Address registers readback Digital I O direction register Interrupt status register Digital output register Digital input readback register EEPROM read write address EEPROM busy status EEPROM data write operation EEPROM data read operation Reload command N A SEND Nn nie N A N A Port Configuration Registers Emerald MM 8Plus contains 18 additional registers for configuring various serial port parameters These registers are accessed through the address pointer register at Base 0 described above The register map is shown in the following table Register No Function 0 Port 0 address 1 Port 1 address 2 Port 2 address 3 Port 3 address 4 Port 4 address 5 Port 5 address 6 Port 6 address 7 Port 7 address 8 Port 0 IRQ no 9 Port 1 IRQ no 10 Port 2 IRQ no 11 3 12 Port 4 IRQ no 13 Port 5 IRQ no 14 Port 6 IRQ no 15 Port 7 IRQ no 16 Port 0 3 protocol configuration 17 Port 4 7 protocol configuration Diamond Systems Corporation Emerald MM 8Plus User Manual Page 19 Writing Data to a Register To write data to a register first write the number of that register 0 17 to the board s address pointer enable register at Base address 0 Then write the data to the board s data register at Base addres
6. Description Manufacturer Part No PC 104 ISA bus A B EPT 962 60323 12 12 PC 104 ISA bus C D EPT 962 60203 12 J3 PC 104 Plus PCI bus connector J4 Serial ports 1 4 15 Serial ports 5 8 15 Digital I O and counter timer Jumper Summary The following table lists the Emerald MM 8Plus jumpers Jumper Description J6 PCI bus slot selection J7 J10 port configuration Serial ports 1 4 respectively J11 J14 Serial port configuration Serial ports 5 8 respectively Diamond Systems Corporation Emerald MM 8Plus User Manual Page 7 Connectors This section describes the connectors on the Emerald MM 8Plus board PC 104 ISA Bus Connectors and 12 carry the ISA bus signal Figure 3 shows the PC 104 A pin layout for and the and D pin layout for J2 These signals are not used to communicate with the CPU but are pass to other cards on the PC 104 stack Figure 3 PC 104 ISA Bus Connectors J1 J2 Al A32 co C19 ML B32 DO p19 J1 Connector J2 Connector Connector Pinout J2 Connector Pinout A1 B1 GND GND CO DO GND 507 A2 B2 RESETDRV SBHE C1 D1 MEMCS16 SD6 A3 B3 5V LA23 C2 D2 lOCS16 SD5 A4 B4 IRQ9 LA22 C3 D3 IRQ10 SD4 5 B5 5V LA21 C4 04 IRQ11 S
7. GND 3 3V KEY Diamond Systems Corporation Emerald MM 8Plus User Manual Page 9 On the Emerald MM 8Plus the octal is connected to the PCI bus is powered by 5V with its PCI interface powered by the PCI bus VIO which can be 3 3V or 5V For this reason the connector is not keyed to prevent certain types of cards from being inserted 1 0 Header Connectors Emerald MM 8Plus provides two identical 40 pin headers labeled J4 and J5 for the serial ports Four ports are contained on each header Figure 5 I O Header Connectors J4 J5 unus Connector J4 is for ports 1 4 and is located along the right side of the board J4 Port No Pin Assignment Pins 1 10 PORT2 Pins 11 20 PORT3 Pins 21 30 PORT4 Pins 31 40 Connector J5 is for ports 5 8 and is located along the left side of the board J5 Port No Pin Assignment PORTS Pins 1 10 PORT6 Pins 11 20 PORT7 Pins 21 30 8 Pins 31 40 Pin numbers are marked the board to assist with connector orientation Cable Assembly Number C DB9M 4 connects this header to four DE 9 Male connectors for direct connection to RS 232 C signaling The following tables list the signals for the appropriate mode of operation as well as the DE 9 pin numbers to which these signals are wired Diamond Systems Corporation Emerald MM 8Plus User Manual Page 10 RS 232 Pin Assignme
8. after the address is selected Note Writing to the serial port address and IRQ registers does not cause a write through to the corresponding EEPROM registers You must explicitly write the data to the EEPROM to store these settings for future use when the board is reset or the power is cycled Address example For a desired I O address of 0x140 0 1 0100 0000 only the upper 7 bits are used The least significant three bits are always 0 resulting in all addresses occurring on 8 byte boundaries The value of the required bits is therefore 0 1 0 1 0 0 0 0x28 An easy way to generate these bits is to divide the I O address by eight or right shift three places Diamond Systems Corporation Emerald MM 8Plus User Manual Page 21 Base 1 Write Bit 7 6 5 4 3 2 1 0 Name D6 D0 06 00 Register data For address registers D6 0 contains the upper 7 bits of the 10 bit base address of the serial port Valid port base addresses are 0x100 to 0x3F8 For interrupt level registers Only 23 0 are used Valid values are 2 3 4 5 6 7 10 11 12 and 15 Any other value prevent interrupts from operating on the selected port Readback Address Register This register provides a means to read back the current address settings for Ports 1 8 as a diagnostic tool to verify that the board is present and responding Using this technique all eight address registers can be read back However th
9. D3 A6 B6 DRQ2 LA20 C5 D5 IRQ12 502 AT B7 12V LA19 C6 D6 IRQ15 SD1 8 B8 ENDXFR LA18 C7 D7 IRQ14 00 A9 9 12V LA17 C8 D8 DACKO IOCHRDY A10 B10 keyed MEMR C9 09 DRQO AEN A11 B11 SMEMW MEMW C10 D10 DACK5 SA19 A12 B12 SMEMR SD8 C11 D11 DRQ5 SA18 A13 B13 IOW 09 C12 012 DACK6 SA17 A14 B14 IOR SD10 C13 D13 DRQ6 SA16 A15 B15 DACK3 SD11 C14 D14 DACKT SA5 A16 B16 DRQ3 012 C15 D15 DRQ7 SA14 A17 B17 DACK1 SD13 C16 D16 5 SA13 A18 B18 DRQ1 SD14 C17 D17 MASTER SA12 A19 B19 REFRESH SD15 C18 D18 GND SA11 A20 B20 SYSCLK keyed C19 D19 GND SA10 A21 B21 IRQ7 SA9 22 B22 IRQ6 SA8 A23 B23 IRQ5 SA7 A24 B24 IRQ4 SA6 A25 B25 IRQ3 SA5 26 B26 DACK2 SA4 A27 B27 TC SA3 A28 B28 BALE SA2 29 B29 5V SA1 A30 B30 OSC SAO A31 B31 GND GND A32 B32 GND Diamond Systems Corporation Emerald MM 8Plus User Manual Page 8 PC 104 Plus PCI Bus The PC 104 Plus bus is essentially identical to the PCI Bus except for the physical design A single pin and socket connector is specified for the bus signals A 120 pin header J3 arranged as four 30 pin rows incorporates a full 32 bit 33MHz PCI Bus The additional pins on the PC 104 P us connectors are used as ground or key pins The female sockets on the top of t
10. Diamond Systems Corporation Emerald MM 8Plus User Manual Page 24 Configuration Register Reload Command Register This register is used to cause a reload of the contents of the EEPROM into the board configuration registers This can be done at any time For example you may use this operation to recall known good settings in the case when invalid data has been loaded into the registers Base 6 Write Bit 7 5 4 3 0 Name RELOAD RELOAD _ Set to 1 to force a reload of the eight address and eight interrupt level settings from the EEPROM into the board The BUSY bit base 4 bit 7 goes high and remains high until the reload is complete Diamond Systems Corporation Emerald MM 8Plus User Manual Page 25 Digital I O and Counter Timer The XR17D158 UART offers 8 built in digital I O lines and a programmable counter timer The 8 DIO lines and the counter timer signals are brought out to an 8 pin connector on the lower edge of the board The DIO and counter timer signals are 3 3V nominal logic signals and have ESD protection The 8 DIO lines are also available on the 8 extra pins on the two serial I O connectors to provide compatibility with EMM 8P The user must be made aware of the limitation that only one source can be used for input either the serial port connector or the dedicated DIO connector The counter timer s output is multiplexed under software control to DIO 0 The counter timer s i
11. TXD RXD 5 5 6 NC GEH NC 8 NC 7 8 GND 9 10 DIOO GND 9 10 DIO4 Port2 NC 11 12 NC NC TXD RXD 2 13 14 TXD RXD 2 RXD6 TXD RXD 6 TXD RXD 6 NC 15 16 NC NC NC NC 17 18 NC NC GND 19 20 DIO1 GND DIO5 Port3 NC 21 22 Port7 NC 3 23 24 TXD RXD 3 TXD RXD 7 TXD RXD 7 25 26 NC NC 27 28 NC NC NC GND 29 30 0102 GND DIO6 NC 31 32 NC Port8 NC TXD RXD 4 33 34 TXD RXD 4 TXD RXD 8 TXD RXD 8 NC 35 36 NC NC NC 37 38 NC NC NC 39 40 DIO3 GND DIO7 Signal Definition DE 9 Pin Direction TXD RXD n Differential Transceiver Data HIGH pin 2 bi directional TXD RXD n Differential Transceiver Data LOW pin 7 bi directional GND Ground pin 5 Signal Ground NC not connected DIOn Digital I O s Diamond Systems Corporation Emerald MM 8Plus User Manual Page 12 RS 422 Pin Assignment J5 J4 NC 1 2 Ports NC 1 2 TXD 1 3 4 TXD 1 TXD 5 3 4 TXD 5 NC 5 6 RXD 1 NC 5 RXD 5 RXD 1 7 8 RXD 5 7 8 NC GND 9 DIOO GND 9 10 204 Port2 11 12 NC Port6 NC NC TXD 2 13 14 TXD 2 TXD 6 TXD 6 15 16 RXD 2 RXD 6 RXD 2 17 18 INC RXD 6 NC GND 19 20 DIO1 GND DIO5 Port3 21 22 Port7 NC NC
12. e IRQ registers cannot be read back All 18 register values can be read back from the EEPROM Base 1 Read Bit T 6 5 4 3 2 1 0 Name D6 D0 D6 D0 Current address settings for Ports 1 8 Digital I O Direction Register This register determines the direction of each of the eight digital I O lines The direction of each bit can be programmed individually This register is cleared to zero 0 on reset or power up bits in input mode Base 2 Write Bit 7 6 5 4 3 2 1 0 Name DIR7 DIR6 DIRS DIR4 DIR3 DIR2 DIRI DIRO DIR7 0 Direction 0 input output Diamond Systems Corporation Emerald MM 8Plus User Manual Page 22 Interrupt Status Register The interrupt status register indicates the status of each port interrupt request line The register operates regardless of whether or not interrupt sharing is enabled see below If two or more ports share the same interrupt level the status register continues to indicate the correct status of each port interrupt request line If different ports share different interrupt levels the status register also continues to operate properly Base 2 Read Bit 7 6 5 4 3 2 1 0 Name INT7 INT6 5 INT4 INT3 INT2 INTI INTO INT7 0 Interrupt request status 0 No interrupt request pending 1 Interrupt request is pending Digital Output Register This regist
13. er programs the digital output lines on the I O headers Any line set to output mode using the configuration register at base 2 is set to the value specified in this register Any I O line in input mode is unaffected The digital output register is cleared to zero 0 on power up or system reset Base 3 Write Bit 7 6 5 4 3 2 1 0 Name DOUT7 DOUTO DOUT7 0 Set digital output line to value specified Digital Input Register This register returns the state of the eight digital I O lines on the I O headers Any line in output mode is read back Any line in input mode is read as the state of the pin on the I O header Input pins that are not driven externally float and have an undefined readback value The value may change on successive read operations which is normal behavior for a floating input pin Base 3 Read Bit 7 6 5 4 3 2 1 0 Name DIO7 DIO6 DIOS DIO4 DIO3 DIO2 DIO1 DIOO DIO7 0 Logic state of I O line 7 0 Diamond Systems Corporation Emerald MM 8Plus User Manual Page 23 EEPROM Command and Address Register This register is used to initiate an EEPROM read or write operation First the data is written to base 5 followed by writing the address and read write bit of this register to initiate the operation After initiating the operation the application program should monitor the BUSY bit by reading this address to detect when the operati
14. es with 5V logic e LED connected to digital I O line 0 Programmable counter timer with selectable clock source e Dual 40 pin I O headers 4 ports per header 5 only operation e Extended temperature 40 to 85 C operation e PC 104 Plus form factor e Stackthrough PC 104 and PC 104 Plus connectors installed Refer to the Exar XR17D1581IV datasheet listed in the Additional Information section of this document for detailed information about using UART DIO and EEPROM functionality with the PC 104 Plus bus Diamond Systems Corporation Emerald MM 8Plus User Manual Page 4 Block Diagram Figure 1 shows the Emerald MM 8Plus functional blocks Figure 1 EMM 8Plus Functional Block Diagram Protocol Selection PCI Slot ID Jumpers Protocol Selection PLD 5 RS232 amp Transceivers 5 Octal UART 8010 8 DIO Counter Timer J15 o 5 Lu 38 a 14 7456 MHz Config Crystal EEPROM Diamond Systems Corporation Emerald MM 8Plus User Manual Page 5 Board Description Figure 2 shows the Emerald MM 8Plus board connectors and jumpers Figure 2 EMM 8Plus Board Layout J3 PT 114 414 J7 C ak 111 1 Diamond Systems Corporation Emerald MM 8Plus User Manual Page 6 Connector Summary The following tables list Emerald MM 8Plus board connectors Connector
15. ge 14 Board Configuration The board provides jumper blocks to configure the following functions e Serial port protocol RS 232 422 485 TTL 2 positions for each port e 5 422 485 RX and TX termination 4 positions for each port e RS 485 echo yes no per port 1 position for each port e PCIslot ID 2 positions for slot 0 3 selection For hardwired configuration locations are provided on the PCB for 0 ohm resistors to be installed to replace each valid jumper position Serial Protocol Selection Jumper blocks J7 through J14 are used to select the protocol for each serial port as shown in the table below Each jumper block configures one port and each port may have its protocol set independently of the other ports Jumper Port J7 1 J8 J9 J10 Jil 12 13 J14 NIAI UOJN In RS 422 or RS 485 networks termination resistors are normally installed at the endpoints of the cables to minimize reflections on the lines Emerald MM 8Plus provides 1500 resistors for this purpose To enable resistor termination for port install jumpers in the locations T and R of that port s corresponding configuration jumper block as shown below Note Termination is only needed and should only be used at the cable endpoints Enabling these termination resistors at each end of the cable results an effective impedance of 600 Installing termination resistors at additional points in the ne
16. he board enable stacking another PC 104 Plus board on top of the Emerald MM 8Plus board The EMM8 PLUS cannot be configured as a PCI bus master In the connector J3 pinout table below the top corresponds to the left edge of the connector when the board is viewed from the primary side the side with the female end of the PC 104 P us connector and the board is oriented so that the PC 104 connectors are along the bottom edge of the board and the PC 104 P us connector is in the top of the Emerald MM 8Plus board Figure 4 PC 104 Plus PCI Connector A B D 1 GND 5 0V KEY Reserved 5V ADOO 2 02 AD01 5V 3 05 GND AD04 ADO3 4 ADO7 GND ADO6 5 ADO9 08 GND 6 AD11 AD10 M66EN 7 AD14 AD13 GND AD12 8 3 3 C BE1 AD15 3 3V 9 SERR GND Reserved PAR 10 GND PERR 3 3V Reserved 11 STOP 3 3V LOCK GND 12 3 3 TRDY GND DESEL 13 FRAME GND IRDY 3 3V 14 GND AD16 3 3V C BE2 15 AD18 3 3V AD17 GND 16 AD21 20 GND AD19 17 3 3 AD23 AD22 3 3V 18 IDSELO GND IDSEL1 IDSEL2 19 AD24 C BE3 IDSEL3 20 GND AD26 AD25 GND 21 AD29 5V AD28 AD27 22 5V AD30 GND AD31 23 REQO GND REQ1 24 GND REQ2 5V GNTO 25 GNT1 GNT2 GND 26 5V CLKO GND CLK1 27 CLK2 5V CLK3 GND 28 GND INTD 5V RST 29 412 INTA INTB INTC 30 12V REQ3 GNT3
17. ht digital I O lines and a 16 bit counter timer Emerald MM 8Plus is connector compatible with the Emerald MM 8P Emerald MM 8M Emerald MM 8232 boards It is compatible with all CPUs with PC 104 Plus connectors The board is intended to be compatible with any CPU with a PC 104 Plus expansion socket and operates with both 3 3V and 5V PCI I O voltage buses Description and Features Two I O headers are provided with four serial ports on each header The board operates on 5V only eliminating the need for a 12V supply that is often required for serial port operation Emerald MM 8Plus is based on the Exar XR17D158IV Octal UART This device contains eight identical sets of registers one set for each port The registers are compatible with the standard PC serial port Each port contains a 64 byte FIFO The Emerald MM 8Plus has the following features e O connectors compatible with Emerald MM 8P two connectors 40 pins four ports per connector Eight serial ports based on Exar XR17D158IV Octal UART with 64 byte FIFOs e 65 232 RS 422 RS 485 and TTL interfaces supported RS 232 422 485 jumper selectable TTL available as a custom assembly configuration e Baud rates to 921 6Kbps in RS 232 or TTL mode 1 8432Mbps in RS 422 RS 485 modes e Jumper selected protocol and line termination e EEPROM storage of configuration data for instant availability on power up e I O lines are short circuit protected e Eight digital I O lin
18. midity 5 to 95 non condensing e PC 104 bus 8 bit and 16 bit bus headers are installed and used 16 bit header is used for interrupt levels only e header 2 40 position 2x20 025 square pin header on 1 centers Headers mate with standard ribbon cable IDC connectors Diamond Systems Corporation Emerald MM 8Plus User Manual Page 27 Additional Information Additional information can be found at the following websites 1 Diamond Systems Corporation http www diamondsystems com 2 Datasheet XR17D158 Universal 3 3V and 5V PCI Bus Octal UART Exar Corporation August 2005 pdf Diamond Systems Corporation Emerald MM 8Plus User Manual Page 28
19. nput is programmable for either an internal clock or an external signal The external signal is available on a pin on the digital I O connector DIO 0 has an LED connected to it for use in displaying board activity or health status Diamond Systems Corporation Emerald MM 8Plus User Manual Page 26 Specifications Serial Ports e No of serial ports 8 e Protocols RS 232 RS 422 RS 485 e Maximum baud rate 921 6Kbps RS 232 1 832Mbps RS 422 RS 485 Communications parameters 5 6 7 or 8 data bits even odd or no parity Short circuit protection All outputs protected against continuous short circuit RS 232 mode Input impedance min Input voltage swing 30V max Display type 5V min 7V typical RS 422 RS 485 modes Differential input threshold 0 2V min 0 2V max Input impedance 12 min Input current 1 0mA max Vin 12V 0 8mA max VIN 7V Differential output voltage 2 0V min RL 50Q High low states differential output voltage symmetries 0 2V max Digital e No of I O lines 8 in 8 out Input voltage Low 0 3V min 0 8V max High 2 0V min 5 3V max Output voltage Low 0 0V min 0 4V max IOL 6mA max High 3 7V min 5 0V max IOH 4mA max General Dimensions 3 55 x 3 775 LxW PC 104 standard e Power supply 5VDC 10 e Current consumption 160mA typical all outputs unloaded Operating temperature 40 to 85 C Operating hu
20. nt J5 DCD1 1 2 DSR1 5 DSR5 RXD1 3 4 RTS1 RXD5 3 4 RTSS TXD1 5 6 CTS1 TXD5 5 5 DTR1 7 8 IRM 5 7 8 IRIS 9 10 DIOO GND 9 10 DIO4 Port2 DCD2 11 12 DSR2 DCD6 DSR6 RXD2 13 14 RTS2 RXD6 RTS6 2 15 16 2 TXD6 CTS6 2 17 18 RI2 DTR6 RI6 19 20 0101 GND DIO5 Port3 DCD3 21 22 DSR3 Port DCD7 DSR7 RXD3 23 24 RTS3 RXD7 RTS7 TXD3 25 26 CTS3 TXD7 CTS7 27 28 DTR7 RI7 29 30 0102 GND DIO6 Port4 DCD4 31 32 DSR4 Port8 DCD8 DSR8 RXD4 33 34 RTS4 RXD8 RTS8 TXD4 35 36 54 TXD8 CTS8 37 38 RI4 DTR8 RI8 GND 39 40 DIO3 GND DIO7 Signal Definition DE 9 Pin Direction DCDn Data Carrier Detect pin 1 Input DSRn Data Set Ready pin 6 Input RXDn Receive Data pin 2 Input RTSn Request to Send pin 7 Output TXDn Transmit Data pin 3 Output CTSn Clear to Send pin 8 Input DTRz Data Terminal Ready pin 4 Output RIn Ring Indicator pin 9 Input GND Ground pin 5 Signal Ground DIOn Digital I O Diamond Systems Corporation Emerald MM 8Plus User Manual Page 11 RS 485 Pin Assignment J5 J4 NC 1 2 Ports NC 1 2 TXD RXD 1 3 4 TXD RXD 1 TXD RXD 5 3 4
21. on is complete Base 4 Write Bit 7 6 5 4 3 2 1 0 Name R W EEA6 5 EEA4 EEA3 EEA2 EEAI 0 R W Command bit 1 write operation 0 read operation EEA6 0 EEPROM address Only the lowest 64 bytes of the 256 byte EEPROM are accessible The lowest 16 bytes contain configuration information for the board The remaining bytes are available for user applications EEPROM Busy Status Register The BUSY bit indicates whether or not the EEPROM is currently performing a read write or reload operation The application program must monitor this bit before performing another operation Performing a new operation without waiting for the previous operation to finish causes the new operation to be ignored Base 4 Read Bit 7 6 5 4 3 2 1 0 Name BUSY BUSY EEPROM Busy status 1 busy 0 idle EEPROM Data Register When writing to the EEPROM the data is first written to this register before the address and write bit are written to register base 4 When reading from the EEPROM the address to read from is first written to base 4 Then the application program must monitor the BUSY bit in base 4 to detect when the operation is complete When it is the BUSY bit is zero 0 the program may read the EEPROM data from this register Base 5 Read Write Bit 7 6 5 4 3 2 1 0 Name EED7 EEDO EED7 0 EEPROM data
22. ort 7 Port 6 Port 6 Port 5 Port 5 Port 4 Port 4 CFGI CFGO CFGI CFGO CFGI CFGO CFGI CFGO CFG0 Protocol 0 0 5 232 1 0 RS 422 0 1 RS 485 with echo 1 1 RS 485 without echo Diamond Systems Corporation Emerald MM 8Plus User Manual Page 20 1 O Register Descriptions This section describes the basic Emerald MM 8Plus register details Address Pointer Enable Register This register selects the address or IRQ register to be programmed and also enables the serial ports The value written to this register can be read back for diagnostic purposes After writing the address to the register the appropriate data are then written to the data register at base 1 Base 0 Read Write Bit 7 6 5 4 3 2 1 0 Name ENABLE A3 A0 ENABLE Enables chip selects for the 8 serial ports 1 enable 0 disable On power up or reset all ports are automatically programmed from the EEPROM and enabled When manually programming the address and IRQ registers this bit must be set after programming is complete to enable the serial ports A3 A0 Address of internal configuration register 0 7 Address registers for ports 0 7 respectively 8 15 Interrupt level register for ports 0 7 respectively Address IRQ Protocol Data Register This register is used to write data to the register selected using the address enable register described above The data are written to this register
23. s 1 Setting a Port Address To program an address for a port write the upper seven bits of the 10 bit I O address into bits 6 0 of the address register for that port The value written to the address register is therefore the desired I O address divided by 8 All I O addresses should be on 8 byte boundaries between 0x100 and 0x3F8 Addresses below 0x100 are reserved for CPU functions A value of 0x00 for a port address disables that port IRQ Selection To select an interrupt level for a port write the desired interrupt level to the port interrupt level register Valid interrupt levels are 2 3 4 5 6 7 10 11 12 and 15 Writing any other value to the interrupt level register including 0x00 causes the port not to generate interrupts Enabling a Port Bit seven of Base 0 is the port enable bit and must be set after manual loading of port addresses and interrupts to enable serial port operation On power up or reset all ports are automatically reloaded with the EEPROM values and are then enabled Configuring Port Protocol To configure the serial protocol for a port the pair of bits assigned to that port must be configured as shown below Register No 16 Bit 7 6 5 4 3 2 1 0 Name Port 3 Port 3 Port 2 Port 2 Port 1 Port 1 Port 0 Port 0 CFG1 CFGI CFGO CFGI CFGO CFGI CFGO Register No 17 Bit 7 6 5 4 3 2 1 0 Name Port 7 P
24. twork may cause overloading and failure of the line drivers due to the lower impedance caused by multiple resistors in parallel In RS 422 or RS 485 networks biasing resistors are normally installed at the endpoints of the cables to force a known inactive state on the lines to reduce noise and eliminate line float by pulling the Data line to 5V and the Data line to ground Emerald MM 8Plus provides 4 7KQ resistors for this purpose To enable resistor termination for a port install jumpers in the locations B of that port s corresponding configuration jumper block as shown above For RS422 networks the RX termination always has biasing resistors connected when used and the TX termination has the biasing resistor connections optional when used Note Biasing is only needed and should only be used at one of the cable endpoints Installing biasing resistors at additional points in the network may cause overloading and failure of the line drivers due to the lower impedance caused by multiple resistors in parallel Diamond Systems Corporation Emerald MM 8Plus User Manual Page 15 RS 232 Selection Figure 6 shows the J7 through J14 jumper settings to select the RS 232 protocol No pins are jumpered Figure 6 RS 232 Protocol Selection RS232 m 2 23 RS 422 Selection Figure 7 shows the J7 through J14 jumper settings to select the RS 422 protocol options Figure 7 RS 422 Protocol Selection Options TXTERM TXTERM RXTERM RXTERM
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