ACT-IR8250P - ACTiSYS Corporation
Contents
1. 1 4 5 5 D D 33v 0 47uF ba Hos m pm m A E x 47008164 n 7 rwv 2 a JM EU 2 Re 7 z 4 5 4 5 a n 6 M 7 5 n 5 1 CIS D o nk to 1R8250 8200 8240PDB boards z n RTS ota ms E TD gm of inb E us TRN e ET Rint RINS o 3 751 4737 RIS alte peor DIR RTs TD DIE B no Rs RI XE U 2 F i 11 Vin Vout saav m po o lea 3 7 E 5 91 a POWER JACI 6 C7 Ch 9 zi 2 5 Je mw mE A A ACTISYS CORP CONFIDENTIAL 2 Sus Nune Raion Copyright 2003 2003 ACTiSYS Corp 0 3 De Sie D nAIRE NIST EVA RESO OT ODEO REST 3 3 PCB footprint amp dimensions part number supplier and pinout spec for the connector J1 on ACT IR8250x0PMB and ACT IR8250PDB boards are as follows Molex part number SD 48148 You can get dimensional information at www molex com More details on section 5 1 Copyright 2003 2007 ACTiSYS Page 12 of 21 Jan 17 2007 Corp Version 0 5 j Chis Y ACT IR8250P The Infrared Wireless Expert Specification 5 2 2 ACT IR8250PDB Daughter Board Circuit Schem2. Tis YS ACT IR8250P The Infrared Wireless Expert Specification outputs Port 1 ta P1 0 to P1 7 P2 0 to P2 5 P3 0 to P3 7 PARAMETER TEST CONDITIONS Te WAX pe lici 1 Hole 1 8 Note Mala o Higher output voltage Ben See Nola voL Lew level euiput veltage mc 25 1 5 z A Hola 8 NOTES 8 Themaximum currant logiae and lii max for all culputs should nol axceed 412 mA te hold the maximum voltage drop specified 9 Thermaximurndotal current lop 8rkd L ma all oupas combined souk exceed 3 48 m4 held ihe max imum veltage drop spocified 10 One culput loaded ai a tima Copyright 2003 2007 ACTISYS Page 15 of 21 Jan 17 2007 Corp Version 0 5 The Infrared Wireless Expert Specification 7 PACKAGE DIMENSIONS 7 1 SOP28 0 680 1 27 Y 0 020 0 84 _ 0 014 0 15 9 010 0 28 1 0 010 025 0 419 10 68 0 400 10 15 0 289 7 58 0 281 7 38 0 080 4 27 0 018 0 40 0 104 12 68 0 012 0 30 CEEE 0 004 0 10 Seating Plane LL 0004 0 994 28 0 710 18 03 A 140 0500 0600 0 700 10 169 15441 17 78 Copyright 2003 2007 ACTiSYS Page 16 of 21 Jan 17 2007 Corp Version 0 5 j C Tis
3. ACT IR8250P The Infrared Wireless Expert Specification 7 2 TSSOP28 mii Seating Plane Copyright 2003 2007 ACTiSYS Page 17 of 21 Jan 17 2007 Corp Version 0 5 r Puk ACT IR8250P ZACTISYS Lt The Infrared Wireless Expert Specification APPENDIX 1 HOW TO USE ACT IR8250PEK ACT IR8250P EVALUATION KIT 111 2 err or E gi yee gn mm a ti rg EJ L O10 B D Darum Ci OEN 00 3 The following steps instruct you how to use ACT IR8250PEK A ACT IR8250PEK Package Includes the following 1 ACT IR82x0PMB ACT IR82x0P IC series to RS232 interface motherboard 2 ACT IR8250PDB ACT IR8250P CMOS 3 3V interface daughter board 3 One 10 pin short cable connectors to connect ACT IR8250PDB to ACT IR82x0PMB 4 One 10 pin connector J1 to connect ACT IR8250PDB cable to your host PCB 5 5 12 VDC AC power adapter B Operating Procedure 1 Connect ACT IR82x0PMB and ACT IR8250PDB by using the short 10 pin cable connectors 2 Plug the DC power in P1 connector 5V to 12V DC is fine 3 Connect ACT IR82x0PMB DBSF directly or use DB9M to DB9F extension cable straight through none cross to PC or to your embedded host device which has DB9M DTE connector ACT IR82x0PMB plays as DCE and any host device to which ACT IR82x0PMB is attached is DTE 4 Activate host device s UART port at
4. ACTiSYS The Wireless Connectivity Expert 48511 Warm Sprints Blvd Suite 206 Fremont CA 94539 Tel 41 510 490 8024 Fax 1 510 623 7268 Web http www actisys com E mail irda info actisys com ACT IR8250P IrDA Compliant Protocol Processor Specification January 17 2007 Version 0 5 Copyright 2003 2007 ACTiSYS Corporation All Rights Reserved j CTiS Y ACT IR8250P The Infrared Wireless Expert Specification TABLE OF CONTENT REVISION HISTORY tud abes Ker EE RESSE ES 3 l FEATURES c na 1 2 OVERVIEW uicta DRE aid pan Dn TR RU NI ND NUR E 6 PIN DESCRIPTION c 7 4 CONNECT ACT IR8250P HOST DEVICE WITH RS232 PORT 8 5 ACT IR8250P EVALUATION KIT ACT IR8250PEK AND ACT IR8250PEKK 9 5 1 ACT IR8250PEK PCB Photos And Dimensions 10 3 4 ScDeimfialleS Leere tien insusi saka 12 6 CHARACTERISTICS AND SPECIFICATION xe 14 GI Absol t Td TT 14 6 2 Recommended operating conditions 14 T PACKAGE Y Re vM DERE RE 16 ESQ 16 17 APPENDIX 1 HOW TO USE ACT IR8250PEK ACT IR825
5. any consumable items such as paper ink ribbon or batteries supplied with the Product or to any equipment or any hardware software firmware or peripheral other than the Product This warranty does not apply to any Product the exterior of which has been damaged or defected which has been subjected to misuse abnormal service or handling or which has been altered or modified in design construction or interfacing Tampering with Label Voids Warranty In order to enforce the rights under this limited warranty the purchaser should mail ship or carry the Product together with proof of purchase to ACTISYS The limited warranty described above is in addition to whatever implied warranties may be granted to purchasers by law To the extent permitted by applicable law ALL IMPLIED WARRANTIES INCLUDE THE WARRANTIES OF MERCHANT ABILITY AND FITNESS FOR USER ARE LIMITED TO A PERIOD OF 1 YEAR FROM THE DATE OF PURCHASE Some states do not allow limitations on how long an implied warranty lasts so the above limitation may not apply to you Neither the sales personnel of the seller not any other person is authorized to make any warranties other than those described above or to extend the duration of any warranties beyond the time period described above on behalf of ACTISYS Corporation The warranties described above shall be the sole and exclusive remedy available to the purchaser Correction of defects in the manner and for the period of time describ
6. 0P EVALUATION 18 8 WARRANTY INFORMATION 20 9 CONTACT INFORMATION 21 Copyright 2003 2007 ACTiSYS Page 2 of 21 Jan 17 2007 Corp Version 0 5 j CT AY AY ACT IR8250P The Infrared Wireless Expert Specification REVISION HISTORY Revision History Revision Dae _ _ 08 21 2003 Preliminary Design Specification 08 26 2003 Removed Chapter 5 and added Appendix 1 0 3 12 08 2003 Updated reference circuit amp IrDA transceiver model Updated implementation examples Added Eval Kit PCB dimensions and circuit schematics 12 19 2003 Updated reference circuit in more detail Copyright 2003 2007 ACTiSYS Page 3 of 21 Jan 17 2007 Corp Version 0 5 j CTiS Y ACT IR8250P The Infrared Wireless Expert Specification 1 FEATURES Acomplete IrDA Protocol stack in a single chip includes mandatory protocols IrPHY IrLAP IrLMP and optional protocols IrLPT IICOMM TinyTP OBEX transport or TinyTP with customized IAS class name for IrSocket Also Includes IrPHY encoding decoding and interfaces directly to Infrared transceivers for data rate from 9 6kbps up to 115 2kbit s Only an external Infrared transceiver is needed to complete an IrDA compliant infrared communication subsystem ACT IR8250P supports IrDA Secondary mode only Supports 64 bytes data packet for IrDA IrLAP frame Interfaces to Host
7. DA connection TX Serial data to host RX I Serial data from host STOP_RX O RX Flow control to host STOP TX I TX Flow control from host Status Status to host Low IrDA connection active ACTISYS CORP 5 IR8250PDB Boar High disallow IrDA connection Enable I Enable from host ic CONFIDENTIAL Size Number Revision Low allow IrDA connection Copyright C 2003 2003 ACTiSYS 0 3 Dale Fie 2408250 5 5 ESCSO 4365 1 2 3 4 5 6 PCB footprint amp dimensions part number supplier and pinout spec for the connector J1 on ACT IR8250x0PMB and ACT IR8250PDB boards are as follows Molex part number SD 48148 You can get dimensional information at www molex com More details on section 5 1 Copyright 2003 2007 ACTiSYS Page 13 of 21 Jan 17 2007 Corp Version 0 5 p ACT IR8250P 1CTISYS me Infrared Wireless Expert 6 CHARACTERISTICS AND SPECIFICATION 6 1 Absolute maximum ratings x Parameter Value Voltage applied at VCC to VSS 0 3 Vto 4 1 V Voltage applied to any pin referenced to VSS 0 3 V to VCC 0 3 V Diode current at any device terminal 2 mA Storage temperature Tstg un programmed device 55 C to 150 C Storage temperature Tstg programmed device 40 C to 85 C xx Stresses beyond those li
8. P C 1 ISYS _ i The Infrared Wireless Expert Specification 5 1 ACT IR8250PEK PCB Photos And Dimensions T8 13 07 inch mm 276 1 30 mm 1 28 IR82x0PMB IR8250PDB PCB footprint amp dimensions part number supplier and pinout spec for the connector J1 on IR8250x0PMB and ACT IR8250PDB boards are as follows Molex part number 50 48148 You can get dimensional information at www molex com More details on the next page Copyright 2003 2007 ACTiSYS Page 10 of 21 Jan 17 2007 Corp Version 0 5 ACT IR8250P ACTISYS me Infrared Wireless Expert Specification Stop_Rx Tx host Rx ACT IR8250PDB J1 Connector CONN JST M 10Pin Pin1 Status Pin2 Stop Rx Pin3 Tx to host Rx Pin4 GND Pin5 Rx to host Tx Pint Ping Pind Pint Pins Ping Pin Ping Pind Pini Pin NC Pin7 Control M Pin10 V Unit mm Copyright 2003 2007 ACTiSYS Page 11 of 21 Jan 17 2007 Corp Version 0 5 CTiS ACT IR8250P The Infrared Wireless Expert Specification 5 2 ACT IR8250PEK Circuit Schematics 5 2 1 ACT IR82x0PMB Motherboard Circuit Schematic
9. atic If your design uses daughter board configuration for convenient placement against front panel with cable connection to your system board it is advisable to maintain the 10 pin connector as in this reference circuit This enables in system ACT IR8250P firmware re programming with new firmware if such need arises This flexibility can extend your product lifetime improve compatibility with new IrDA devices add or change IrDA functionality Indeed it s a valuable and useful feature 1 3 4 5 6 333v D L 3 0 luF 2 2_ vec RI MH ape des s n m 8 Cl 7 3728MHz R4 ATR Yor J s ups IR SD esi E i i mac 100k R3 433V 1 JRST 7 lem R6 TEDUISOD s 0 for low po wl 4 70E 16V ale M c vanas y m P37 L IRS250P Warning very sensitive to EMI aav n 1 2 3 GND 2 TEST 5 Enable Stop 3 10 Vee Link io TRB2x0PEK board NAME vo DESCRIPTION USAGE High idle stop bit 1 bit Low start bit 0 bit High idle stop bit 1 bit Low start bit 0 bit High 188250 not ready to accept RX Low IR8250P ready to accept RX High Host not ready to accept TX Low Host ready to accept TX High no Ir
10. device via a full function UART port Supports host baud rate from 300k bps to 115 2k bps selecting by programmable settings Programmable Device name IAS class name and data format setting Available in programmed and tested chip ACT IR8250P assembled amp tested board ACT IR8250PDB or assembled amp tested evaluation kit ACT IR8250PEK Low supply voltage 3 0 V to 3 6 V Low current consumption 21A standby 3mA active Small low profile plastic 28 pin SSOP TSSOP package In system programmable FLASH facilitates firmware changes or updates The evaluation kit ACT IR8250PEK includes AC power supply RS232 level translators and PC software for in system re programming of firmware and future firmware options ACT IR8250PEK consists of ACT IR82x0PMB motherboard ACT IR8250PDB Self downloadable SW to program ACT IR8250P firmware 1 ACT IR82x0PMB RS232 level converter DB9 connector probe pins and ACT IR8250PDB connector 2 ACT IR8250PDB daughter board for direct connection to your embedded PCB Self contained full function IrDA module which consists of ACT IR8250P protocol IC IrDA transceiver 3 3V interface connector Avery useful Evaluation Kit Full Set is ACT IR8250PEKK which is ACT IR8250PEK ACT IR4000US notebook desktop USB IrDA adapter This kit set can test ACT IR8250P connected to your device to exchange IrDA data with ACT IR4000US connected to PC USB port running hyper te
11. ed above shall constitute full satisfaction of all claims whether based on contract negligence strict liability or otherwise In no event shall ACTiSYS Corporation be liable or in any way responsible for any damages or defects in the Product which were caused by repair or attempted repairs performed by anyone other than ACTiSYS technician Nor shall ACTiSYS Corporation be liable or in any way responsible for any incidental or consequential economic or property damage Some states do not allow the exclusion of incidental or consequential damages so the above exclusion may not apply to you FOR YOU RECORDS For your assistance in reporting this product in case of loss or theft please record below the model number and serial which are located on the bottom of the case Please retain this information Model Number Serial Number _ Date of Purchase Copyright 2003 2007 ACTiSYS Page 20 of 21 Jan 17 2007 Corp Version 0 5 CTISYS ACT IR8250P The Infrared Wireless Expert Specification 9 CONTACT INFORMATION 0M bi heb The Wireless Infra red Expert IrDA Protocol Software For Portable Devices IrDA Test Software For Hardware Systems DA Printer And Computer Adapters S eK and lt i EN lt lt 100M 1000M ACTiSYS Corporation 48511 Warm Springs Blvd Suite 206 Fremont CA 94539 USA TEL 1 510 490 8024 FAX 1 510 623 7268 E Mail irda info actisys com Web http ww
12. eep it open Serial data to Host 19 High ldle Stop bit 1 bit Low Start bit 0 bit Serial data from Host High ldle Stop bit 1 bit Low Start bit O bit P3 6 P3 7 17 18 Reserved Keep it open Transmit data to transceiver High IR on Low IR off Reserved Keep it open IrDA status to Host High No IrDA connection Low IrDA connection active RX flow control to Host P1 1 STOP_RX 22 High ACT IR8250P not ready to accept RX Low ACT IR8250P ready to accept RX Eka 1 Received data from transceiver n Active low High No IR Low IR detected P1 3 P1 7 24 28 VO Reserved Keep it open Copyright 2003 2007 ACTiSYS Page 7 of 21 Jan 17 2007 Corp Version 0 5 p ACT IR8250P AZACTISYS me Infrared Wireless Expert Specification 4 CONNECT ACT IR8250P TO A HOST DEVICE WITH RS232 PORT Devices that use serial cables for their communication are split into two categories These are DCE Data Communications Equipment and DTE Data Terminal Equipment Data Communications Equipment is the device such as your modem TA adapter plotter etc while Data Terminal Equipment is your Computer or Terminal The following shows how to connect ACT IR8250P to a DTE and a DCE Note A RS232 level converter chip is needed when ACT IR8250P is connected to a RS232 interface There are a total of 7 signals between the host and ACT IR8250P The pin assignment and name
13. er full etc 7 J3 and J5 If your host just supports wire UART Tx Rx GND you probably have to set DTR and RTS always enabled i e set ACT IR8250P in no flow control status To accomplish this either a Pin 2 3 shorted so DTR RTS are always enabled or b Pin 1 2 shorted so host takes control of when DTR RTS are enabled or disabled 8 J4 Reserved 9 410 Power jumper short it to apply external non regulated power to ACT IR8250P You should NOT short J10 if you choose to us J11 below J11 3VDC regulated power e g battery input connector traces You may use this location to place your own 3VDC connector if you don t have available external non regulated power to connect to J10 J11 MUST NOT be shorted e D Please refer to the software ACT IR8250SW user s manual for detail features about ACT IR8250PEK Copyright 2003 2007 ACTiSYS Page 19 of 21 Jan 17 2007 Corp Version 0 5 CTIS YS ACT IR8250P The Infrared Wireless Expert Specification 8 WARRANTY INFORMATION ACTiSYS Corporation warrants the first end user purchaser for a period of 1 year from the date of purchase that this wireless interface The Product will be free from defective workmanship and materials and agrees that it will at its option either repair the defect or replace the defective Product or part thereof at no charge to the purchaser for parts or for labor This warranty does not apply to any appearance items of the Product
14. ia the wired serial interface with hardware flow control IrDA has two modes one is Primary and the other is Secondary The difference between them is that Primary initiates the discovery negotiation and connection sequence to Secondary and decides IrDA protocol parameters While Secondary always passively waits for commands from Primary Both modes can run different protocols and both may send or receive user data ACT IR8250P supports Secondary mode only Fig 1 is system diagram Host controller IrDA Transceiver Copyright 2003 2007 ACTiSYS Page 6 of 21 Jan 17 2007 Corp Version 0 5 j CT AY AY ACT IR8250P The Infrared Wireless Expert Specification 3 PIN DESCRIPTION Symbol Pin No Descriptions TEST 1 Reserved Pull low with 30k ohm resistor 2 Digital supply voltage positive terminal V 3 Vo esed Pull high with 30k ohm resistor __ 4 Digital supply voltage negative terminal Ground CC 2 5 SS XIN XOUT Output terminal of crystal oscillator nRST NMI 7 Reset input n Active low Input port for crystal oscillator Standard crystals can be connected P2 O nEnable Power control from Host n Active low High Power down ACT IR8250P Low Enable and power on Shut down transceiver iiit 3 fo High Shut down Low Enable TX flow control from host P2 2 STOP TX 10 High Host not ready to accept TX Low Host ready to accept TX P3 0 P3 3 11 14 VO Reserved K
15. of each signal at the chip levels are summarized in Table 1 below Please note that DTE denotes signals on the RS232 board or device In order to connect them to another DTE a null modem converter is used in between The pin assignments and the names are listed in this table Table Host interface signals ACT IR8250P RS232 DTE device RS232 DCE device Pin No Name Pin No Type Name Pin No Type Name TX RX nEnable Status STOP TX STOP GND Copyright 2003 2007 ACTiSYS Page 8 of 21 Jan 17 2007 Corp Version 0 5 CTIS YS ACT IR8250P The Infrared Wireless Expert Specification 5 ACT IR8250P EVALUATION KIT ACT IR8250PEK AND ACT IR8250PEKK It is recommended that customer verify the compatibility with your host system by using ACT IR8250P evaluation kit ACT IR8250PEK It is a self contained unit with ACT IR8250P IrDA transceiver RS232 level converter and external AC power connector All built into a compact package ACT IR8250 evaluation kit immediately enables your host system to be IrDA IrReady certifiable Moreover this kit can be a full PCB with RS232 interface or as half PCB with UART interface without the burden of RS232 interface circuitry ACT IR8250PEK package consists of IR82x0PMB motherboard ACT IR8250PDB Self downloadable SW to program ACT IR8250P firmware 1 ACT IR82x0PMB RS232 level converter DB9 connector probe pins and ACT IR8250PDB connect
16. or 2 ACT IR8250PDB daughter board for direct connection to your embedded PCB Self contained full function IrDA module which consists of ACT IR8250P protocol IC IrDA transceiver 3 3V interface connector A more useful Evaluation Kit Full Set is ACT IR8250PEKK which is ACT IR8250PEK ACT IR4000US notebook desktop USB IrDA adapter This set can test ACT IR8250P connected to your device to exchange IrDA data with ACT IR4000US connected to PC USB port running Hyper terminal with Windows IrDA driver It can avoid debugging multiple issues e g Is this a PDA application issue SW activated and behaves properly Is this an ACT IR8250P to host interface issue UART data rates flow control data bit parity stop bit signal pins power levels Or is this a performance issue throughput distance error rate dropping bits The following figure is ACT IR8250P evaluation kit ACT IR8250PEK It consists of two boards ACT IR82x0PMB on the left and ACT IR8250PDB on the right connected to each other by 10 pin connector cable You can connect this evaluation kit to your host RS232 port or use ACT IR8250PDB board to connect to your host CMOS level UART signals The corresponding circuit schematics for ACT IR82x0PMB and ACT IR8250PDB are also included below The detail User s Guideline is described in Appendix 1 How to use ACT IR8250PEK Copyright 2003 2007 ACTiSYS Page 9 of 21 Jan 17 2007 Corp Version 0 5 Oo ACT IR8250
17. rminal under Windows IrDA driver To avoid debugging multiple issues e g Is this a PDA application issue IIDA SW activated and behaves properly with the matching protocol layer ACT IR8250P to host interface issues UART data rates flow control data bit parity stop bit UART signal pins power levels Performance issues throughput distance error rate dropping bits Copyright 2003 2007 ACTISYS Page4of21 Jan 17 2007 Corp Version 0 5 ACT IR8250P 1CTISYS The Infrared Wireless Expert Specification DW OR PW PACKAGE TOP VIEW TEST 1 O LI P1 2 nIR RX nRST NMI LT 7 LL P1 1 STOP RX P2 0 nEnable LLL 8 P1 0 Status P2 1IR SD 19 P2 2 STOP TX LT 10 P2 3 IRITX 1 P3 5 RX ACT IR8250P Copyright 2003 2007 ACTiSYS Page 5 of 21 Jan 17 2007 Corp Version 0 5 ACT IR8250P ACTIS 5_ The Infrared Wireless Expert Specification 2 OVERVIEW ACT IR8250P is a low cost small pin count high integration in system programmable micro controller with on chip IrDA protocol stack and on chip Infrared physical encoder decoder It provides a serial interface to a host device that intends to have Infrared communication capability The host device can be any equipment or device that needs to communicate with IrDA enabled devices via IrDA protocol with only a wired serial interface ACT IR8250P will handle all the detail about IrDA protocol It sends receives user data to from the host device v
18. sted under absolute maximum ratings may cause permanent damage to the device These are stress ratings only and functional operation of the device at these or any other conditions beyond those indicated under recommended operating conditions is not implied Exposure to absolute maximum rated conditions for extended periods may affect device reliability NOTE All voltages referenced to VSS 6 2 Recommended operating conditions Parameter MIN TYPICAL MAX Units Supply voltage during program execution VCC 1 8 3 3 3 6 V Supply voltage VSS 0 Operating free air temperature range TA 40 85 DC current Shut down mode 2 uA DC current Active mode 2 mA Crystal frequency 7 3728 MHz The DC current in active mode is not included transceiver operating current Electrical characteristics over recommended ranges of supply voltage and operating free air temperature unless otherwise noted Schmitt trigger inputs Port P1 to Port P3 P1 0 to P1 7 P2 0 to P2 5 P3 0 to P3 7 PARAMETER TEST CONDITIONS MIN TYP UNIT VIT Positive going input threshold voltage 1 1 1 5 VCC 3 0V 1 5 1 9 VIT Negative going input threshold voltage 22N 0 4 0 9 VCC 3 0V 0 9 13 Vhys Input voltage hysteresis VIT VIT 2 2 0 3 1 1 VCC 3 0V 0 5 1 0 Copyright 2003 2007 Pagel4of2i Jan17 2007 Corp Version 0 5
19. this moment LED D8 and D12 should light up 5 Activate the other IrDA device e g PDA or cellular phone and face it to ACT IR8250PDB If IR link is successfully established between two devices LED D1 and D5 will light up Copyright 2003 2007 ACTiSYS Page 18 of 21 Jan 17 2007 Corp Version 0 5 j CTiS Y ACT IR8250P The Infrared Wireless Expert Specification It means you can transmit and receive data between the two IrDA devices now 6 In this IR link set up your embedded host device ACT IR82x0PMB is IrDA secondary station and PDA cellphone is IrDA primary station IrDA primary station initiates commands and establishes IrDA connection C Definition of Jumpers and LEDs 1 LED D8 When it lights up means DTE host enables its RTS When host UART buffer is going to be full host should disable this signal line 2 LED 010 When it flashes means DTE host is sending data 3 LED D12 When it lights up means DTE host enables its DTR Enabling DTR means host is ready and orders ACT IR8250P to enter ready to receive mode 4 LED D1 When it lights up means ACT IR8250P enables its DSR D1 lights off means that IR link is not yet established 5 LED D3 When it flashes means ACT IR8250P is receiving data from another IrDA device and sends these data to host device 6 LED D5 When it lights up means ACT IR8250P enables its CTS D5 lights off means ACT IR8250P is not allowed to receive any data from host device e g buff
20. w actisys com Copyright 2003 2007 ACTISYS Page 21 of 21 Corp Jan 17 2007 Version 0 5
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