Emerald-MM-8 User Manual
Contents
1. E Fin LIEU tt ILS PC 104 bus 8 bit connector PC 104 bus 16 bit connector UO header for ports 1 4 2x20 pins 4 DIO I O header for ports 5 8 2x20 pins 4 DIO Termination jumper blocks two ports per block Board address and interrupt pulldown resistor configuration JTAG Programming Connector Bias Resistor Enable Jumper Block for Channel 4 2005 Diamond Systems Corp Emerald MM 8P User Manual V1 00 Page A 4 1 0 HEADER PINOUTS Emerald MM 8P provides two identical 40 pin headers labeled J3 and J4 for the serial ports Four ports are contained on each header Pin numbers are marked on the board to assist with connector orientation Depending on the model you have each port may be fixed in a single protocol or configurable for different protocols The template connector pinouts below are provided to show the pinout for each port in each configuration The actual pinout of each connector will depend on the model you have and the configuration you have set for each port RS 232 Configuration Port 5 DCD 5 DSR 5 RXD 5 RTS 5 TXD 5 5 DTR 5 RI 5 op 9 10 DOE Port 6 DCD 6 DSR 6 RXD 6 RTS 6 TXD 6 CTS 6 DTR 6 RI 6 GND 19 20 Dor Port 7 DCD 7 DSR 7 RXD 7 RTS 7 TXD 7 CTS 7 DTR 7 RI 7 GND 9 70 DIOG Port 8 DCD 8 DSR 8 RXD 8 RTS 8 TXD 8 15 16 CTS8 17 DTR8 17 18 GND 19 20 Don 2005 Diamond Systems Corp Emerald MM 8P User Manual V1 002. DIAMOND SYSTEMS CORPORATION EMERALD MM 8P 8 Channel Software Programmable Protocol Serial Port PC 104 Module User Manual V1 01 Copyright 2005 DIAMOND SYSTEMS CORPORATION 8430 D Central Ave Newark CA 94560 Tel 510 456 7800 Fax 510 456 7878 techinfo diamondsystems com www diamondsystems com TABLE OF CONTENTS 1 DESCRIPTION tae ES dde ide dte atn 3 25 BBATURESOG Se a NOR a Ka GAN GA di v XUI I EUIS Dee ER NG Ka Sa AN ad aja a aa 3 3 EMERALD MM 8P BOARD DRAWING 60000000000000000000000000000000000 0000000000 0000000000 0000000000000000 0000000000 4 4 VO HEADER PINOUTS nl ni ie ei ea eot NENGNA NB a A NGGEN a brest 5 5 VO HEADER PUN DEFINITIONS eegen 7 6 BOARD CONFIGURATION een dde 8 6 1 PORT AND INTERRUPT REGISTER ADDRESS SELECTION 8 6 2 RS 422 RS 485 CABLE ENDPOINT IERMINATION 9 OS INTERRUPT SHARING SE ile M LM EI 9 Te 10 3 ZOE ERC 12 8 1 ADDRESS POINTER ENABLE REGISTER BASE ADDRESS 0 12 8 2 ADDRESS IRQ PROTOCOL DATA REGISTER BASE ADDRESS 1 WRITE 12 8 3 ADDRESS REGISTER READBACK BASE ADDRESS 1 13 8 4 DIGITAL I O DIRECTION REGISTER BASE ADDRESS 2 WRITE 13 8 5 INTERRUPT STATUS REGISTER BASE ADDRESS 2 READ ee
3. 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 IRQ No 9 Port 1 IRQ No 10 Port 2 IRQ No 11 Port 3 IRQ No 12 Port 4 IRQ No 13 Port 5 IRQ No 14 Port 6 IRQ No 15 Port 7 IRQ No 16 Ports 0 3 Protocol Configuration 17 Ports 4 7 Protocol Configuration 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 address 1 To program an address for a port write the upper 7 bits of the 10 bit 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 100 Hex and 3F8 Hex Addresses below 100 Hex are reserved for CPU functions A value of 00 Hex for a port address will disable that port To select an interrupt level for a port write the desired interrupt level to that port s 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 00 Hex will cause that port not to generate interrupts Bit 7 of Base address 0 is the port enable bit and must be set after manual loading of port addresses and interrupts in order to enable serial port operation On power up or re
4. ports corresponding configuration jumper block J5 J8 Termination is only needed and should only be used at the cable endpoints Enabling these termination resistors at each end of the cable results in an effective impedance of 600 Installing termination 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 6 3 Interrupt Sharing On the PC 104 bus interrupt levels may be shared by multiple devices For this reason the interrupt is driven to a logic high level by the device requesting service and when the device is serviced it tristates the line rather than driving it low This technique avoids contention by two devices trying to drive the line with opposing logic levels In order to guarantee valid logic levels on the line when the device is not requesting service each active interrupt level requires a 1KQ pulldown resistor Only one such resistor should be used on each active interrupt line For each interrupt level availabe on Emerald MM 8P there is a position on J9 with that interrupt level no for enabling the pulldown resistor Install a jumper in this position to connect the resistor and remove the jumper to disconnect the resistor 6 4 UART Clock Selection For those applications that require high baud rates a jumper is provided on J9 labeled CK to select 7 3 28MHz for the UART clock source when installed and 1
5. 2 will be set to the value specified in this register Any I O line in input mode will not be affected The digital output register is cleared to 0 on power up or system reset Name Dou Dout3 Dow Douro Dout 7 0 Set digital output line to value specified 8 7 Digital Input Register Base Address 3 Read This register returns the state of the 8 digital I O lines on the I O headers Any line in output mode will be read back Any line in input mode will be read as the state of the pin on the I O header Input pins that are not driven externally will float They will have an unpredictable readback value and the value may change on successive read operations This is normal behavior for a floating input pin e 7 s T3 L5 L2 Name 007 oios oios no nos Boe moe DIO 7 0 Logic state of I O line 7 0 2005 Diamond Systems Corp Emerald MM 8P User Manual V1 00 Page 13 8 8 EEPROM Command and Address Register Base Address 4 Write This register is used to initiate an EEPROM read or write operation First the data is written to Base 5 then the address and read write bit are written to this register to initiate the operation After writing the operation has started the application program should monitor the Busy bit by reading this address to know when the operation is complete R W Read Write bit 1 write oper
6. HEG SZ DosDevices HEG SZ COMA COM8 ForceFifoEnable REG DWORD 0x1 ForceFifoEnable REG DWORD 0x1 Interrupt REG DWORD 0x7 Interrupt REG DWORD 0x7 InterruptStatus REG DWORD 0x202 InterruptStatus REG DWOHRD 0x202 PortAddress REG DWORD 0x108 PortAddress HEG DWORD 0x128 Portindex REG DWORD 0 2 Portindex REG DWORD 0 6 Sharedinterrupts REG DWORD 0x1 Sharedinterrupts REG DWORD 0x1 Serial5 Serial9 DosDevices HEG SZ DosDevices HEG SZ COM5 COM9 ForceFifoEnable REG DWORD 0 1 ForceFifoEnable REG DWORD 0 1 Interrupt REG DWORD 0x7 Interrupt REG DWORD 0x7 InterruptStatus REG _DWORD 0x202 InterruptStatus REG _DWORD 0x202 PortAddress REG DWORD 0x110 PortAddress REG DWORD 0x130 Portindex REG DWORD 0x3 Portindex REG DWOHRD 0x7 Sharedinterrupts REG DWORD 0 1 Sharedinterrupts REG DWORD 0 1 Serial6 Serial10 DosDevices HEG SZ DosDevices HEG SZ COM10 COM6 ForceFifoEnable REG DWORD 0 1 ForceFifoEnable REG DWORD Oki Interrupt REG DWORD 0x7 Interrupt REG DWORD 0x7 InterruptStatus REG DWORD 0x202 InterruptStatus REG DWORD 0x202 PortAddress REG DWORD 0x138 PortAddress REG DWORD 0x118 Portindex REG DWORD 0x8 Portindex REG DWORD 0 4 Sharedinterrupts REG DWORD 0x1 Sharedinterrupts REG DWORD 0 1 Page 18 11 SPECIFICATIONS Serial Ports No of serial ports Protocols Maximum baud rate Communications parameters Short circuit protection RS 232 mode Input impedance Input voltage swing Output voltage swing RS 422 RS 485 modes Differe
7. Page 5 RS 485 Configuration 2005 Diamond Systems Corp Emerald MM 8P User Manual V1 00 Page 6 5 1 0 HEADER PIN DEFINITIONS Signal Name Definition Direction RS 232 DCD Data Carrier Detect Input DSR Data Set Ready Input RXD Receive Data Input RTS Request To Send Output TXD Transmit Data Output CTS Clear To Send Input DTR Data Terminal Ready Output Ring Input RS 422 TXD Differential Transmit Data Output RXD RXD Differential Receive Data Input RS 485 TXD RXD Differential Transmit Receive Bi directional TXD RXD Differential Transmit Receive Bi directional Common to all protocols DIO A H Digital I O lines Programmable GND Ground NC Not Connected 2005 Diamond Systems Corp Emerald MM 8P User Manual V1 00 Page 6 BOARD CONFIGURATION 6 1 Refer to the Drawing of Emerald MM 8P on page 4 for locations of the configuration items mentioned here Port and Interrupt Register Address Selection Each peripheral board in the computer system must have a unique I O address or block of addresses Emerald MM actually uses nine address blocks one for each of the eight serial ports and one for the board s configuration registers Each ports address block consists of 8 consecutive addresses while the configuration and interrupt status register block occupies four addresses Jumper block J9 in the lower left corner of the board is used for configuration of t
8. a reload of the 8 address settings and 8 interrupt level settings from the EEPROM into the board The BUSY bit Base 4 bit 7 will go high and stay high until the reload is complete X Not used 2005 Diamond Systems Corp Emerald MM 8P User Manual V1 00 Page 14 9 EEPROM OPERATION 9 1 EEPROM Map and Description Emerald MM 8P V1 has an EEPROM for storage of the address and interrupt level settings for each serial port The EEPROM has 256 bytes total of which the lowest 64 are addressible Only the lowest 18 registers in the EEPROM are used The first 8 locations 0 7 are used to store the base address values for the 8 serial ports The second 8 locations 8 15 are for the 8 interrupt levels IRQ numbers The last two locations 16 and 17 are used to store the port protocol for each port The memory map of the EEPROM is identical to the register map for the addresses and interrupts on Emerald MM 8P EEPROM Address 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 IRQ No 9 Port 1 IRQ No 10 Port 2 IRQ No 11 Port 3 IRQ No 12 Port 4 IRQ No 13 Port 5 IRQ No 14 Port 6 IRQ No 15 Port 7 IRQ No 16 Ports 0 3 Protocol Configuration 17 Ports 4 7 Protocol Configuration The address values stored in EEPROM are the upper 7 bits of the 10 bit serial port address Each serial port uses 8 registers so the binary base addr
9. address registers can be read back but the IRQ registers cannot be read back All 18 register values can be read back from the see page 14 for details 8 4 Digital UO Direction Register Base Address 2 Write This register determines the direction of each of the 8 digital I O lines The direction of each bit can be programmed individually This register is cleared to 0 on reset or power up all bits in input mode an 7 e DIR 7 DIR 6 DIR 5 DIR 4 DIR 3 DIR 2 DIR 1 DIRO Dir 7 0 Oczinput 1 output 8 5 Interrupt Status Register Base Address 2 Read The interrupt status register indicates the status of each port s interrupt request line It operates regardless of whether interrupt sharing is enabled see below If two or more ports are sharing the same interrupt level the status register will still indicate the correct status of each port s interrupt request line If different ports are sharing different interrupt levels the status register will still operate properly sw 7 5 ssl selle wt wre wes wre wre wr inro Definitions 7 0 Status of interrupt request for each port 0 no interrupt request active 1 interrupt request active 8 6 Digital I O Output Register Base Address 3 Write This register programs the digital output lines on the I O headers Any line set to output mode using the configuration register at base
10. eliminating the need for a 12V supply that is often required for serial port operation Emerald MM 8P is based on the 16C554 quad serial port IC This device contains 4 identical sets of registers one for each port and is compatible with the standard PC serial port Each port contains a 16 byte FIFO Complete descriptions of these registers may be found in the Appendix Most users will not need this programming information as it is normally handled by the operating system s communications software N FEATURES 8 serial ports with 16 byte FIFOs Software Configurable RS 232 RS 422 RS 485 Up to 115 2kbps in standard configuration 460 8kbps available Software selectable I O addresses and interrupt levels EEPROM storage of configuration data for instant availability on power up I O lines are short circuit protected 8 programamble digital I O lines 1 per port Dual 40 pin I O headers 4 ports per header 5V only operation Extended temperature 40 to 85 C operation PC 104 form factor 9 2005 Diamond Systems Corp Emerald MM 8P User Manual V1 00 Page 3 3 EMERALD MM 8P BOARD DRAWING PORTS 8 4 1 J1 J2 J3 J4 J5 J8 J9 J10 J11 J8 BO 2 7 ul IGT n SR 5 JS iTia fol 1R n 27 26 EL J6 art ET LL 4Rj 2
11. 8432MHz for the UART clock source when not installed Most standard serial drivers assume a 1 8432MHz clock source so the jumper should remain off to be compatible with driver baud selection 6 5 Power Up Port Enable For those applications that require all ports to be disabled during power up a jumper is provided on J9 labeled PD to enable all configured ports during power up when installed or disable all ports during power up when not installed 6 6 Port D Bias Jumpers For those RS423 and RS485 applications where bias resistors are not needed there are jumpers located at J11 to enable biasing when installed and disable biasing when not installed 2005 Diamond Systems Corp Emerald MM 8P User Manual V1 00 Page 9 7 REGISTER MAP Emerald MM 8P Register Map Base Address Write Read 0 Address pointer enable register Address pointer enable register Data for address IRQ no Readback of address registers 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 N A N A Emerald MM 8P contains 18 additional registers for selecting the address and and interrupt level for each port These registers are accessed through the address pointer register at Base O The register map is shown below Register No Function 0 Port 0 Address
12. LSB through 0x8 for MSB Note this is NOT weighted bit value See page 13 for details Sharedinterrupts REG DWORD 0x1 for yes 0 0 for no 3 Exit REGEDT32 EXE and restart NT See the example parameter values on the following page 2005 Diamond Systems Corp Emerald MM 8P User Manual V1 00 Page 17 Windows NT Registry Setup Example The following example is for 8 ports on an EMM 8P XT board installed on a CPU that already contains 2 serial ports called COM1 and COM2 Note that all 8 ports on the Emerald MM 8P board share the same interrupt status register but the bit position changes for each port The settings shown are the factory settings for the board All ports are set to share the same interrupt number Configuration selections 2005 Diamond Systems Corp Emerald MM 8P User Manual V1 00 Port1 Port2 Port3 4 Port5 Port6 Port7 Ports Address 0x100 0x108 0x110 0x118 0x120 0x128 0x130 0x138 IRQ No 7 7 7 7 7 7 7 7 Board base address 0x200 Interrupt status register 0x202 Serial3 Serial7 DosDevices REG 54 DosDevices REG 54 COM3 COM7 ForceFifoEnable REG DWORD 0 1 ForceFifoEnable REG DWORD 0 1 Interrupt REG DWORD 0 7 Interrupt REG DWORD 0 7 InterruptStatus REG _DWORD 0x202 InterruptStatus REG _DWORD 0x202 PortAddress REG DWORD 0x100 PortAddress REG DWORD 0x120 Portindex REG DWORD 0x1 Portindex REG DWOHRD 0x5 Sharedinterrupts REG DWORD 0 1 Sharedinterrupts REG DWORD 0 1 Serial4 Serial8 DosDevices
13. ation 0 read operation EEA6 0 EEPROM address The EEPROM has 256 bytes only the lowest 64 are accessible Only the lowest 16 contain configuration information for the board The other registers are available for customer application 8 9 EEPROM Busy Status Base Address 4 Read The Busy bit indicates whether the EEPROM is busy with a read write or reload operation The application program must monitor this bit after each read write or reload operation before proceeding to another one If a new EEPROM operation is commenced without waiting for the previous one to finish the new operation will be ignored Bit No Name BUSY EEPROM Busy status 1 busy 0 idle X Not used 8 10 EEPROM Data Register Base Address 5 Read Write When writing to the EEPROM the data is first written to this register before the address and write bit are written to Base 4 When reading from the EEPROM the address to read from is first written to Base 4 Then the program must monitor the BUSY bit in Base 4 When it is 0 the program may read the EEPROM data from this register EED7 0 EEPROM data 8 11 Configuration Register Reload Command Base Address 6 Write This register is used to cause a reload of the contents of the EEPROM into the board s configuration registers This can be done at any time for example to recall known good settings in case the user loads invalid data into the registers RELOAD Setto 1 to force
14. ess of each serial port always ends in 000 To determine the value to store in the EEPROM divide the desired base address by 8 Desired base address 120 Hex 01 0010 0000 288 Decimal EEPROM value 288 8 36 Decimal 224 Hex 2010 0100 These are the 7 uppermost bits of the original base address This value would be written to the selected port s address location in the EEPROM to program that port for The IRQ numbers stored in EEPROM are the actual IRQ numbers without any changes Each port may be programmed for its own IRQ number or any number of ports may share an IRQ Not all IRQs are available in all computers You will need to test for availability and operability of the selected IRQ NOTE The serial port base addresses must be distinct from each other and must also be distinct from the board s base address If any serial port s address is programmed to overlap with the board s base address that port will not be accessible and the address will have to be reconfigured 2005 Diamond Systems Corp Emerald MM 8P User Manual V1 00 Page 15 9 2 How to Use the EEPROM There are three available EEPROM operations write data read data and reload data The write and read operations store data in the EEPROM but have no effect on the board s configuration settings The reload operation updates the board s configuration settings to match the values stored in the EEPROM Note that writing to the board s serial port address and IRQ regi
15. he board s base address The serial port I O addresses are set in software once this address is known To help with the translation between jumper settings and addresses remember that each jumper installed corresponds to a 0 and each jumper out corresponds to a 1 The 4 jumpers DC B A correspond to address bits 9 8 7 6 and address bits 5 0 are forced to 0 to determine the base address Board Configuration Register Addresses Base Address DIO Direction Register Addr Pointer Data Interrupt Status D C B A Register Register Register DIO Register In In In In Invalid setting In In In Out Invalid setting In In Out In Invalid setting In In Out Out Invalid setting In Out In In 100 101 102 103 In Out In Out 140 141 142 143 In Out Out In 180 181 182 183 In Out 1 0 1C1 1C2 1C3 Out In In In 200 201 202 203 Out In In Out 240 241 242 243 Out In Out In 280 281 282 283 Out In Out Out 2C0 2C1 2C2 2C3 Out Out In In 300 301 302 303 Out Out In Out 340 341 342 343 Out Out Out In 380 381 382 383 Out Out Out Out 3CO 3C1 3C2 3C3 2005 Diamond Systems Corp Emerald MM 8P User Manual V1 00 Page 8 6 2 RS 422 RS 485 Cable Endpoint Termination 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 8P provides 1200 resistors for this purpose To enable resistor termination for a port install jumpers in the locations T and R of that
16. ite data to the register selected with the address enable register described above The data must be written to this register after the address is selected Note that writing to the board s serial port address and IRQ registers does not cause a write through to the corresponding EEPROM registers The user 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 X Not used D6 0 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 100 Hex to 3F8 Hex For interrupt level registers Only D3 0 are used Valid values are 2 3 4 5 6 7 10 11 12 and 15 Any other value will prevent interrupts from operating on the selected port Address example Desired I O address 140 01 0100 0000 Only the upper 7 bits are needed The three lowest bits are always 0 resulting in all addresses being on 8 byte boundaries Necessary bits 0 101000 28 An easy way to generate these bits is to divide the I O address by 8 or shift right 3 places 2005 Diamond Systems Corp Emerald MM 8P User Manual V1 00 Page 12 8 3 Address Register Readback Base Address 1 Read 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 8
17. l additionally configure the NT registry with the proper settings according to the configuration you select The configuration programs and instructions are in the zip file EMM8 zip that is included in the board s software diskette For DOS and Windows 9x applications complete instructions are in the file readme txt in the DOS 9x folder and the application program is called eepconf exe For Windows NT applications complete instructions are in the file EMM8 NT txt in the NT folder and the application is called Emm8Conf exe The instructions below may be used to manually set up Windows NT to run with the board However these instructions are not needed if Emm8Conf exe is used 1 Run REGEDT32 EXE and go to the following dialog box Key Local Machine System CurrentControlSet Service Serial Parameters 2 Add a new key for each serial port by selecting Edit Add Key The following parameters need to be specified for each serial port SerialN N serial port number 1 2 3 4 Parameter Type Value Comments DosDevices HEG SZ Name of port e g COM5 COM6 ForceFifoEnable REG DWORD 0 1 for yes Interrupt REG DWORD IRQ level in Hex format e g 0x5 for 5 or OxA for 10 InterruptStatus REG DWORD Address of interrupt status register in Hex e g 0x102 See page 8 for status register addresses PortAddress REG DWORD Address or port in Hex e g 0x120 for Hex 120 Portindex REG DWORD Bit position in status register Ox1 for
18. ne nennen 13 8 6 DIGITAL I O OUTPUT REGISTER BASE ADDRESS 3 13 8 7 DIGITAL INPUT REGISTER BASE ADDRESS 3 Rap 13 8 8 EEPROM COMMAND AND ADDRESS REGISTER BASE ADDRESS 4 WRITE 4 8 9 EEPROM BUSY STATUS BASE ADDRESS 4 Rap 14 8 10 EEPROM DATA REGISTER BASE ADDRESS 5 READ WRITE c ccsseccceeseccceescceeeeececeeeeceeens 14 8 11 CONFIGURATION REGISTER RELOAD COMMAND BASE ADDRESS 6 WRITE 14 0 EEPROM OPERA TION eege 15 St EEPROM MAPAND DESCRIPTION casts anae aaa a aa sah aaa a Tah ai abang aa ara OT a aa a aii 15 DOWN EE Ee 16 10 INSTALLING EMERALD MM 8P IN YOUR SYSTEM 60000000000000000000000000000000 000000000000 00000000 17 11 SPECIFICATIONS EE 19 12 STI6C 554 QUAD UART DATASHEET VE 20 2005 Diamond Systems Corp Emerald MM 8P User Manual V1 00 Page 2 R A L D M M 8 8 Channel Software Configurable Protocol Serial Port PC 104 Modules 1 DESCRIPTION Emerald MM 8P is a PC 104 I O module with 8 serial ports with protocols that are software programmable UO addresses and interrupt levels are programmable for each port allowing maximum configuration flexibility For applications where fixed addresses are desirable four groups of preset addresses are provided that can be selected by jumper settings Two headers are provided with four serial ports on each header The board operates on 5V only
19. ntial input threshold Input impedance Input current Differential output voltage High low states differential output voltage symmetry Digital UO No of I O lines Input voltage Output voltage General header Dimensions Power supply Current consumption Operating temperature Operating humidity PC 104 bus 2001 Diamond Systems Corp 8 EMM 8P XT RS 232 RS 422 RS 485 115kbps standard version 460 8kbps available by special order contact factory 5 6 7 or 8 data bits Even odd or no parity All outputs protected against continuous short circuit 3KQ min 30V max 5V min 7V typical 0 2V min 0 2V max 12KQ min 1 0 12V 0 8mA max 7V 2 0V min RH 500 0 2V max At Vcc 5 0VDC 8 in 8 out Low 0 3V min 0 8V max High 2 0V min 5 3V max Low 0 0V min 0 4V max loi 6mA max High 3 7V min 5 0V max 4mA max 2 40 position 2x20 025 square pin header on 1 centers Headers mate with standard ribbon cable IDC connectors 3 55 x 3 775 LxW PC 104 standard 5VDC 10 160mA typical all outputs unloaded 40 to 85 C Industrial range 5 to 95 noncondensing 8 bit and 16 bit bus headers are installed and used 16 bit header is used for interrupt levels only Emerald MM 8 User Manual V2 33 Page 19 12 ST16C554 QUAD UART DATASHEET 2001 Diamond Systems Corp Emerald MM 8 User Manual V2 33 Page 20
20. set all ports are automatically reloaded with the EEPROM values and then enabled To configure the serial protocol for a port the pair of bits assigned to that port must be configured as shown below 2005 Diamond Systems Corp Emerald MM 8P User Manual V1 00 Page 10 REGISTER 16 5232 5422 1 rse _ 1 o RS 5wihEo 2005 Diamond Systems Corp Emerald MM 8P User Manual V1 00 Page 11 8 REGISTER DETAIL 8 1 Address Pointer Enable Register Base Address 0 Read Write 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 this register the appropriate data is written to the data register at Base address 1 See 8 2 below Bit No Name 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 in order to enable the serial ports X Not used A3 0 Address of internal configuration register 0 7 Address registers for ports 0 7 respectively 8 15 Interrupt level register for ports 0 7 respectively 8 2 Address IRQ Protocol Data Register Base Address 1 Write This register is used to wr
21. sters does not cause a write through to the corresponding EEPROM registers The user 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 The EEPROM contains 256 bytes However only locations 0 63 may be accessed Only EEPROM addresses 0 17 are used to store data for the configuration of Emerald MM 8P The remaining locations are available for customer application use EPROM Write Operation 1 Write data to Base 5 2 Write 6 bit address including Write bit bit 7 1 to Base 4 3 Monitor Busy bit bit 7 in base 4 until it is O EEPROM Read Operation 1 Write 6 bit address to Base 4 Bit 7 0 for read 2 Monitor Busy bit bit 7 in base 4 until it is O 3 Head data from Base 5 EEPROM Reload Operation 1 Write 0x80 128 to Base 6 to initiate Reload operation 2 Monitor Busy bit bit 7 in base 4 until it is O 2005 Diamond Systems Corp Emerald MM 8P User Manual V1 00 Page 16 10 INSTALLING EMERALD MM 8P IN YOUR SYSTEM Diamond Systems provides utility programs to configure the Emerald MM 8P board for use in your computer system For DOS and Windows 9x applications the program will configure the address and interrupt settings store them in the EEPROM on the board and allow you to store them in a file which can be used later to program additional boards with the same configuration For Windows NT applications the program wil
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