ELAN DIGITAL SYSTEMS LTD. SP230 PC
Contents
1. 10 ACKbar_ INTRbar in acknowledge 11 BUSY _ WAITbar i bwy k 12 PE USERDEF in _ preo 13_ _SLCT ___ _USERDEF n o semo auto feed 15 ERRbar USER DEF m moe 16 INITbar_ RESETbar out resetsignaal 17 SELECTINbar ADDRSTBbar out select 18 25 GND _ GND Ts signal ground Elan Digital Systems Ltd 16 SP230 USER S GUIDE 5 2 ELECTRICAL All figures quoted are typical parameters 25 C RS232 SIGNALS Typical output level 5 5V LPT SIGNALS Typical Vol 0 3V Voh 4 8V Vil 0 7V Vih 2 4V Driver output impedance typ 30ohms Input amp output capacitance typ 800pF Open drain drivers use 4 7KOhm pull ups to Vcc ESD PROTECTION All RS232 signal lines on the SP230 card are protected against electrostatic discharge ESD e 15kv human body model e 8kv IEC1000 4 2 contact discharge e 15kv IEC1000 4 2 air gap discharge All LPT signal lines on the SP230 are protected against electrostatic discharge ESD e kv 330R and 150pF discharge model UART CLOCK SPEED xl mode 1 8432MHz max baud rate 115 2K Baud x8 mode 14 7456MHz max baud rate 921 6K Baud 5 3 POWER CONSUMPTION All figures quoted are typical parameters 25 C VCC CURRENT 25mA typical at 5V with no connections 35mA typical at 5V 115KBaud and LPT connected 5 4 MECHANICAL MASS 12g typical FORM FACTOR Typell PC Card 5 5 ENVIRONMENTAL HUMIDITY lt 80 non condensing TEMP 0 502. ELAN DIGITAL SYSTEMS LTD LITTLE PARK FARM ROAD SEGENSWORTH WEST FAREHAM HANTS PO15 5SJ TEL 44 0 1489 579799 FAX 44 0 1489 577516 e mail support pcecard co uk website http www pccard co uk SP230 PC CARD USER S GUIDE All Trademarks are duly acknowledged REVISION HISTORY ISSUE PAGES DATE NOTES a EC eee eT ee a a a Elan Digital Systems Ltd 1 SP230 USER S GUIDE Table of Contents 1 OVER VIEW vise ssccdecieccccdes cecsccsscsscsesccactesatesss sus susdesvcsascssvccteaseseobea sSeesstecsbustsdessndecasedkebeesseetastssbrsdveavenes 3 2 ABOUT THE SP2S0 ii scccciccccsscsccssescosscssscssasnccvasescocossencecbevonasedecoacsedesaseesessoscasdevsscasdensssnedsnadososuassesoas 4 3 INSTALLING THE SP230 sccccccisccsscaccsaccesiestescesecvscsessuccchscsucosselexccnsseonsbecsnoncusbsesccbesgeesheddecvsansuseeas 6 3 1 DOS amp WINDOWS 31X NTM aiaa aa a eee eee ROS RR 6 3 2 WINDOWS 95 98 98SE ME 2000 XP cccecesssssssssssssssssssssssssssssssssessesesssssessesesssesseseeesseseeeeseeeees 6 3 3 WINDOWS CE POCKETPC i s cicscdencccevs Ge lieel eis coagesecctea seeccgos se dee te E EEE AA uttdadeveedeveuterteeccessaaeeetes 8 4 SP230 REGISTER INTERFACE cccccssscssssssssscsssscssscsscessesssessecscssscsscsesescsscnsssssesssesseesseees 9 4I SERIAL POR Taria esserne eona e aean deed des dette ee iea e a e secede th des Jester 9 AD PARALLEL PORT HAE EE OEE EEE AATE A ER EEO EE TOR EEE
3. S GUIDE 2 ABOUT THE SP230 Serial Port The SP230 PC Card provides an RS232 serial port which uses Elan s own 16550 compatible UART ASIC device called the VPU16550 The serial data and control lines are buffered using ESD protected RS232 drivers which feature an auto power down mode when the RS232 cable is not connected Industry standard baud rates up to 115 2K baud are supported together with 16 byte deep TX and RX FIFOs Additionally the SP230 can be set to multiply the baud rates by 8 allowing up to 921KBaud to be used The faster rates are transparent to the O S so you ll have to remember to multiply the rate you set in software by 8 to tell you what the real hardware rate is e g if you set 19200baud in software and you select x8 mode the real rate will be 153600baud For further information please refer to the WPU16550 data sheet available from our website http www pccard co uk Parallel Port The SP230 follows the IEEE1284 standard to offer 3 modes of operation 1 Uni directional SPP mode This mode is closest to the legacy Centronics mode as was found on the original IBM AT printer adapter The 8 data lines are output only and certain of the output control lines use open drain drivers with 4 7KOhm pull ups This mode can also be known as nibble mode because the only way to input data is via the 4 input status lines 2 Bi directional SPP mode This mode is identical to uni directional SPP mode ex
4. acknowledge the cycle some time later by setting its WAITbar signal high The SP230 will respond to this edge by setting the ADDRSTBbar or DATASTBbar signal high followed by the WRITEbar strobe In response the peripheral will set its WAITbar signal low or sometime in the future ready for the next cycle A read cycle follows the same pattern except the WRITEbar signal remains high the whole time and the host reads the data present on DATA 0 7 that is being driven by the peripheral make sure DIR is set to a 1 before the read cycle If an EPP cycle is started by the SP230 and cannot complete within 8us because either the WAITbar signal stays low or it goes high and stays high then the cycle will be terminated and the EPP timeout bit will be set Elan Digital Systems Ltd 20 SP230 USER S GUIDE The following diagrams show the basic transfers diagrammatically EPP Port Write Access WRITEbar ADDRSTBbar or DATASTBbar WAITbar DATALO 7 EPP Write Cycle EPP Port Read Access Fi WRITEbar ADDRSTBbar or DATASTBbar CT OoOO lf WAITbar S rs a DATALO 79 ZRS Ved KA EPP Read Cycle Elan Digital Systems Ltd 21 SP230 USER S GUIDE
5. is provided as is with no warranty express or implied as to its quality or fitness for a particular purpose Elan assumes no liability for any direct or indirect losses arising from use of the supplied code Copyright 2002 Elan Digital Systems Ltd Elan Digital Systems Ltd 2 SP230 USER S GUIDE 1 OVERVIEW The SP230 is a multifunction RS232 Serial and JEEE1284 Parallel Port PC Card with the following features e Industry standard RS232 COM port with 16550 UART e TEEE1284 Parallel Port featuring SPP Uni directional SPP Bi directional and EPP Modes e Windows 95 osr2 98 98SE Me 2000 XP compatible using standard O S drivers Serial data rates up to 921K Baud using x8 baud rate mode Full hardware modem control line support on COM port Standard decode for COM1 to COMn and LPT1 2 or 3 Any IO port and interrupt decode option for best pnp flexibility ESD protected RS232 and Parallel Port drivers Low power consumption 5V operation Supplied with 300mm cable with DB9 male using standard COM port pin out and DB25 female with standard LPT port pin out This guide aims to familiarize you with the way that the SP230 works and so will help you to maximize its performance in your application Elan will be happy to quote for either customization of the SP230 if its exact specifications do not quite meet your needs or to create complete application software Elan Digital Systems Ltd 3 SP230 USER
6. 1 will allow an external circuit to over drive the 4 7KOhm pull up resistor then bit2 will act as an input reading the level from pin16 Inverse of DB25pin17 In SPPU mode setting bit3 to 1 will drive pin17 low and force bit3 to read as 0 But setting it to 1 will allow an external circuit to over drive the 4 7KOhm pull up resistor then bit3 will act as an input reading the inverted level from pin17 INTACK SPPU 0 SPPB amp EPP DIR This port is the control register for the parallel port It allows direct bit wise access to the control signals that connect to the attached parallel device 12 SP230 USER S GUIDE EPP Address Port IOBASE 3 THIS REGISTER FUNCTIONS IN EPP MODE ONLY BIT FUNCTION A write access to this port will trigger an EPP ADDRESS WRITE cycle with nADDRSTB and nWRITE asserted and DATA 0 7 output to DB25pins2 to 9 A read cycle to this port will trigger an EPP ADDRESS READ cycle with nADDRSTB asserted and data read from DB25pins2 to 9 See Appendix A ieai 0 4 6 Note that the DIR bit must be set to 1 prior to a read cycle Elan Digital Systems Ltd 13 SP230 USER S GUIDE EPP Data Port IOBASE 4 5 6 and 7 THESE REGISTERS FUNCTION IN EPP MODE ONLY BIT FUNCTION A write access to any of these port will trigger an EPP DATA WRITE cycle with nDATASTB and nWRITE asserted and DATA 0 7 output to DB25pins2 to 9 A read cycle to this port wil
7. C ambient 5 6 NOTES ON SERIAL DATA THROUGHPUT The maximum serial baud rate of 921KBits sec does not imply that the maximum sustained throughput rate of the serial port will be as high The actual throughput rate that can be achieved depends on Elan Digital Systems Ltd 17 SP230 USER S GUIDE many factors including the host PC speed the serial data source s data block size and whether the block are back to back whether the interrupt in use on the host is being shared by other devices leading to increased latency etc As a simple rule of thumb using the standard serial drivers on a fast PC will allow throughput rates of 400 600KBits sec although these rates can t be guaranteed and will be application specific 5 7 SP230 MODE CONFIGURATION The SP230 can be configured using a small bank of DIP switches arranged at the rear of the PC Card The diagram below shows the function of each switch The switches should be set to the desired mode of operation before the card is inserted and used a gt OFF ON gt BAUD RATE x1 BAUD RATE x8 gt not used not used gt BOTH OFF SPP SPP UNI DIRECTIONAL MODE BI DIRECTIONAL MODE EPP MODE not used E ON orr AS A Figure 5 7 1 SP230 DIP Switch Settings Elan Digital Systems Ltd 18 SP230 USER S GUIDE 5 8 BAUD RATE SETTINGS The table below illustrates the common baud rate value
8. EEEE S T N EE TEE 10 5 HARDWARE SPECIFICATION cccsccsscssssssscsocssesscesssessssscessesscesseessesscesscesscssccsseseseseasseessense 15 DF ed ALO 1 0 EEEE E EEE EE EEE EET EB ERB ERR 15 DAPA m B D EA h id LOAN ERE E E ES EE 17 3 3 POWER CONSU MP T ON N N A eee 17 54 MECHA NCA a N a a 17 SVEN VIRONMENT Air N HSE a a Sa a a e 17 5 6 NOTES ON SERIAL DATA THROUGHPUT cccccecscscececececseseesecseeeeceeseseeeesseseseeeeeess 17 5 1 SP230 MODE CONFIGURATION e E A A a r Aa 18 5 8 BAUD RATE SETTINGS vas nna tebe e E SEE A EE 19 APPENDIX A EPP MODE wisssscscisscccssssstcssccesssccossssscccasseenecvssansechsovscdeteponascdesecdeedssdeoasdenssedsdeoseoseceneecace 20 DISCLAIMER This document has been carefully prepared and checked No responsibility can be assumed for inaccuracies Elan reserves the right to make changes without prior notice to any products herein to improve functionality reliability or other design aspects Elan does not assume any liability for loses arising out of the use of any product described herein neither does it convey any license under its patent rights or the rights of others Elan does not guarantee the compatibility or fitness for purpose of any product listed herein Elan products are not authorized for use as components in life support services or systems Elan should be informed of any such intended use to determine suitability of the products Source code supplied with Elan PC Cards and Compact Flash cards
9. TINbar The bit written is inverted and output to DB25pin17 In SPPU mode the output driver is an open drain type with a 4 7KOhm pull up In all other modes the driver is a totem pole type INTACK Setting this bit low prevents the parallel port from making interrupts Setting this bit high allows the rising edge of DB25pin10 ACKbar to activate an IRQ Once an IRQ is activated it will stay asserted until a read or write access to any of the parallel port registers SPPU Not used SPPB amp EPP DIR In SPPU this bit is write only In SPPB amp EPP this bit controls the data port output drivers A l in this bit will tri state them allowing the data port to act as an input A 0 in this bit will enable the output drivers Inverse of DB25pin1 In SPPU mode setting bit0 to 1 will drive pin low and force bit0 to read as 0 But setting it to 0 will allow an external circuit to over drive the 4 7KOhm pull up resistor then bitO will act as an input reading the inverted level from pin1 Inverse of DB25pin14 In SPPU mode setting bit1 to 1 will drive pin14 low and force bit to read as 0 But setting it to 0 will allow an external circuit to over drive the 4 7KOhm pull up resistor then bit will act as an input reading the inverted level from pin14 DB25pin16 In SPPU mode setting bit2 to 0 will drive pin16 low and force bit2 to read as 0 But setting it to
10. cept that a previously unused register bit is now used to tri state the 8 data line output drivers allowing data to be read in and the open drain drivers become normal totem pole outputs the 4 7KOhm resistors become disabled in this mode Having the bi directional data port offers a great improvement in transfer speed for equipment that must communicate data in both directions 3 EPP mode This mode preserves all the same features as Bi directional SPP mode but also adds extra IO ports to allow data handshaking to occur automatically with the connected device Elan Digital Systems Ltd 4 SP230 USER S GUIDE This offers a large increase in data throughput capability To use EPP mode may require special drivers as Windows support is limited EPP mode is described in Appendix A The SP230 only supports EPP1 9 mode EPP1 7 mode was superseded by EPP1 9 mode Elan Digital Systems Ltd 5 SP230 USER S GUIDE 3 INSTALLING THE SP230 3 1 DOS amp Windows 3 1x NT4 The SP230 is not suited to use in DOS or Windows 3 1x because it is a true multi function PC Card 3 party Card and Socket Services drivers for such cards do not exist multi function cards were defined sometime during Windows95 roll out and correspondingly DOS drivers were not updated and were left to support only single function cards This is simply a function of available software and is NOT a shortcoming of the SP230 hardware A similar situation is found wi
11. is the level at the DB25 pins which will be the same as the byte written if the port is set to the output direction in the Control Port ieee Elan Digital Systems Ltd 10 SP230 USER S GUIDE sa Port IOBASE 1 RESET WRITE m n Not used tee 1 EPP Clear timeout EPP Timeout This bit is set in EPP mode if an EPP cycle did not complete within approx 8us The bit is cleared by writing a 1 back to this bit Further EPP cycles are permitted while the EPP Timeout bit is set EA Sey Follows ERRbar signal DB25pin12 Follows PE leu ACKbar signal DB25pin11 Inverse of BUSY signal This port is the status register for the various signals that are inputs from the connected parallel device DB25pin13 Follows SLCT signal Elan Digital Systems Ltd 11 SP230 USER S GUIDE Elan Digital Systems Ltd Control Port IOBASE 2 FUNCTION STROBEbar The bit written is inverted and output to DB25pin1 In SPPU mode the output driver is an open drain type with a 4 7KOhm pull up In all other modes the driver is a totem pole type AUTOFDbar The bit written is inverted and output to DB25pin14 In SPPU mode the output driver is an open drain type with a 4 7KOhm pull up In all other modes the driver is a totem pole type INITbar The bit written is output to DB25pin16 In SPPU mode the output driver is an open drain type with a 4 7KOhm pull up In all other modes the driver is a totem pole type SELEC
12. l trigger an EPP DATA READ cycle with nDATASTB asserted and data read from DB25pins2 to 9 See Appendix A Note that the DIR bit must be set to a 1 prior to a read cycle Note that by performing 16 24 or 32 bit IO cycles to IOBASE 5 6 or 7 respectively the host will automatically break the transfer down into several 8 bit wide EPP cycles accessing IOBASE 5 6 7 etc in turn so allowing more efficient word or dword wide transfers 0 4 6 Elan Digital Systems Ltd 14 SP230 USER S GUIDE 5 HARDWARE SPECIFICATION 5 1 PINOUT The SP230 is supplied with a 300mm long Type313 cable that terminates with both a DB9 Male connector with female screwlocks and a DB25 Female connector with female screwlocks both connectors are a match of the ports at the back of a PC The pin outs below show the connections at the end of the DB9 and DB25 connectors DB9 COM PORT PINOUT MALE NAME FUNCTION 2 RX Receive Datainput 3 5 Data Set Ready input 8 s ear ToSendinput O PoP RE CRing indicate input RX TX ND Elan Digital Systems Ltd 15 SP230 USER S GUIDE DB25 LPT PORT PINOUT FEMALE Baal SPP NAME EPP NAME in Out Bidir from FUNCTION see STROBEbar WRITEbar strobe ena 2 DATAO DATAO bidir databito 4 DATA2 DATA2 bidir databit2 6 DATAd DATA4 bidir databit4 k 8 DATA6 DATAG bidir databito f 9 DATA7 DATA7 bidr databit7
13. ng Pick the first free port in the list Windows will then ask you to re boot again The LPT port should now be useable in the usual way These O S also allow you to change the COM port number Go to the Device Manager and expand the Ports branch There you will find the SP230 Com Port COMxx Double click on this device and use the Properties page to adjust the COM port number that Windows assigned by default Elan Digital Systems Ltd 7 SP230 USER S GUIDE 3 3 Windows CE PocketPC The SP230 will not work in either of these O S because of a limitation in the handling of true multi function PC Cards Elan Digital Systems Ltd 8 SP230 USER S GUIDE 4 SP230 REGISTER INTERFACE 4 1 Serial Port Full details of the SP230 s UART register interface can be found in the VPU 16550 data sheet available at Elan s website http www pccard co uk Elan Digital Systems Ltd 9 SP230 USER S GUIDE 4 2 Parallel Port In the following tables SPPU means SPP uni directional mode SPPB means SPP bi directional mode and EPP means EPP mode Data Port IOBASE 0 BIT FUNCTION SPPB amp EPP DB25pin2 SPPB amp EPP DB25pin3 SPPB amp EPP DB25pin4 SPPB amp EPP DB25pin5 SPPB amp EPP DB25pin6 SPPB amp EPP DB25pin7 SPPB amp EPP DB25pin8 SPPB amp EPP DB25pin9 This port is the 8 bit wide data register that connects to pins 2 to 9 on the DB25 connector Note that in SPPB amp EPP modes the read state of this register
14. s available for each of the baud rate multiplier switch positions 300 300 2400 1200 1200 9600 2400 2400 19200 4800 4800 38400 9600 9600 76800 19200 19200 153600 38400 38400 307200 57600 57600 460800 115200 115200 921600 Elan Digital Systems Ltd 19 SP230 USER S GUIDE Appendix A EPP Mode EPP Mode uses interlocking handshakes This means that the interface can exchange data with a peripheral and the transfer will happen at a rate dictated by the slowest device the host or the peripheral This maximises throughput speeds and takes away timing uncertainties due to cable length capacitance I O driver speeds etc The basic transfer uses the WAITbar signal to control the cycle The SP230 uses EPP1 9 mode where it will not initiate an EPP cycle unless the WAITbar signal is low On initiating a cycle the SP230 will assert either DATASTBbar or ADDRSTBbar depending on whether the cycle is of data or address type In fact either type of cycle is just a way of passing data back and forth across the interface but data cycles are defines specifically for data transfers whereas address cycles could transfer control addressing or command data For a write cycle the SP230 will assert WRITEbar to signal the start of the cycle as well either ADDRSTBbar or DATASTBbar The data on DATA 0 7 will be the byte written to one of the EPP ports make sure to set DIR to a 0 The peripheral will
15. th Windows NT4 although it is more likely that 3 party tools may exist to support this O S 3 2 Windows 95 98 98SE Me 2000 XP The generic serial and parallel drivers in these Operating Systems support the SP230 No extra driver software is needed but you will need to install Card Center Pro to get the SP230 registered with the O S Simply run SETUP and follow the instructions given Note that you must reboot the PC after installation to allow the com and Ipt ports to be assigned port numbers by the O S Note that for Win9x and Me the port numbers assigned cannot be changed and are a function of the other ports you have in your system Special Note for Windows2000 and XP Parallel ports don t default to having an LPT port number assigned in either of these two operating systems On first installation of the SP230 you should follow the instructions that you are given i e re boot when you are asked to do so these are Windows prompts After the whole process is complete go to the Device Manager right click My Computer select Properties Device Manager Hardware Expand the Ports branch You should see SP230 Lpt Port COMxx and there should be an exclamation mark along side it You ll notice that Windows has given it a COM port number not Elan Digital Systems Ltd 6 SP230 USER S GUIDE an LPT port number Double click this device and use the Port Settings tab to access the LPT port number setti
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