EMERALD-MM User Manual - Diamond Systems Corporation
Contents
1. 4 etc Parameter Type Value Comments DosDevices REG_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 0x224 PortAddress REG_DWORD Address or port in Hex e g 0x120 for Hex 120 Portindex REG_DWORD Bit position in status register Ox1 for LSB through 0x4 Sharedinterrupts REG _DWORD 0 1 for yes 0 0 for 3 Exit REGEDT32 EXE and restart NT See the example on the following page 2013 Diamond Systems Corp Emerald MM User Manual Revision F 00 Page 11 Windows NT Example The following example is for an EMM XT board installed on a CPU that already contains 2 serial ports called COM1 and COM2 The address setting combination is A out B in C out and all ports are sharing interrupt level 12 Note that all ports share the same interrupt status register but the bit position changes Port 1 Port 2 Port 3 Port 4 Interrupt Status Register Address 0x120 0x128 0x130 0x138 0x244 Interrupt Level 12 12 12 12 Serial3 DosDevices REG_SZ COM3 ForceFifoEnable REG DWORD 0 1 Interrupt REG_DWORD Oxc InterruptStatus REG_DWORD 0x244 PortAddress REG_DWORD 0x120 Portindex REG DWORD 0 1 Sharedlnterrupts REG DWORD 0x1 Serial4 DosDevices REG_SZ COM4 ForceFifoEnable REG_DWORD 0 1 Interrupt REG_DWORD Oxc InterruptStatus REG_DWORD 0x244 PortAddress REG_DWORD 02. max 12KQ min 1 0 max Vin 12V 0 8mA max 7V 2 0V min 50Q 0 2V max 2 20 position 2x10 025 square pin header on 1 centers Headers mate with standard ribbon cable IDC connectors 3 55 x 3 775 PC 104 standard 5VDC 10 80mA typical all outputs unloaded 40 C to 85 C standard 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 User Manual Revision F 00 Page 13
3. C 2013 Diamond Systems Corp Emerald MM User Manual Revision F 00 Page 5 Signal 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 RI Ring Indicator Input RS 422 TXD 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 GND NC Ground Not Connected 2013 Diamond Systems Corp Emerald MM User Manual Revision F 00 Page 6 5 BOARD CONFIGURATION 5 1 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 five I O address blocks one for each of the four serial ports and one for the interrupt status register Each port s address block consists of 8 consecutive addresses while the interrupt status register occupies a single address The I O addresses are set with jumper block J7 located at the right edge of the board Eight different I O address combinations are selectable The address shown below for each port is the base address of that port i e the lowest address of the port s I O address block Interrupt A B C Port 1 Po
4. EMERALD MM User Manual 4 Channel Multi Protocol Serial Port PC 104 Module Rev F 00 October 2013 EETITTITITITITITITNMN Copyright 2013 DIAMOND SYSTEMS CORPORATION 555 Ellis Street Mountain View CA 94043 Tel 650 810 2500 Fax 650 810 2525 techinfo diamondsystems com www diamondsystems com TABLE OF CONTENTS ID U 3 2 FEATURES 3 3 EMERALD MM BOARD DRAWING ssmsmennennnnnnnnnnnnnnnnennnnennenenesensnes 4 4 SERIAL PORT I O HEADER PINOUT AND PIN DESCRIPTION sense 5 5 BOARD CONFIGURATION 7 6 RS 485 TRANSMITTER CONTROL sesesesesesesesesesesesesesesesesesesesesesesesesesesesesesesesesesesesesesesesesesesesese 10 7 1 WIRE INTERFACE vonn iann EREEREER RR ARRENAR ERRA RR ERORE RERA RRRS 10 8 INSTALLING EMERALD MM IN WINDOWS NT musee 11 ERPUOn 13 2013 Diamond Systems Corp Emerald MM User Manual Revision F 00 Page 2 EMERALD MM 4 Channel Multi Protocol Serial Port PC 104 Module 1 DESCRIPTION Emerald MM is a PC 104 format I O module with 4 serial ports Its model number and description are EMM 4M XT 4 ports configurable for RS 232 RS 422 or RS 485 Eight different I O address combinations can be selected and 10 different interrupt levels can be assigned to configure each port allowing operation as COM1 t
5. ader for serial ports 1 and 2 User 1 0 header for serial ports and 4 Configuration for serial port 1 Configuration for serial port 2 I O address configuration Interrupt level configuration for port 1 Interrupt level configuration for port 2 Interrupt level configuration for port 3 Interrupt level configuration for port 4 Factory use only Configuration for serial port 3 Configuration for serial port 4 1 Wire interface Model EMM 1W XT only 2013 Diamond Systems Corp Emerald MM User Manual Revision F 00 Page 4 4 SERIAL PORT I O HEADER PINOUT AND PIN DESCRIPTION Emerald MM provides two identical 20 pin headers labeled J3 and J4 for the 4 serial ports Two ports are contained on each header Pin 1 and numbers are marked on the board for connector polarity identification For 1 Wire interface see page 10 RS 232 Configuration DCD 1 DCD 3 DSR 3 RXD 1 RXD 3 RTS TXD 1 TXD 3 CTS DTR 1 DTR3 RI 3 GND GND NC DCD 2 DCD 4 DSR 4 RXD 2 RXD 4 RTS 4 TXD 2 TXD 4 CTS 4 DTR2 DTR 4 RI 4 GND GND NC RS 422 Configuration NC NC NC NC TXD 1 TXD 1 TXD 3 TXD 3 GND RXD 1 GND RXD 3 RXD 1 NC RXD 3 NC GND NC GND NC NC NC NC NC TXD 2 TXD 2 TXD 4 TXD 4 GND RXD 2 GND RXD 4 RXD 2 NC RXD 4 NC GND NC GND NC RS 485 Configuration NC NC NC NC TXD RXD 1 TXD RXD 1 TXD RXD 3 TXD RXD 3 GND NC GND NC NC NC NC NC GND NC NC NC NC NC NC NC TXD RXD 2 TXD RXD 2 TXD RXD 4 TXD RXD 4 GND NC GND NC NC NC NC NC GND NC NC N
6. hould be used on each active interrupt line Each interrupt configuration header on Emerald MM has a position marked R for enabling the pulldown resistor Install a jumper in this position to connect the resistor and remove the jumper to disconnect the resistor If two or more ports are sharing the same interrupt level install the jumper in the R position for any one of the ports and leave it off the others Interrupt Status Register 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 we OX X LOCI X De ws Definitions X Bit not used generally reads back as a 1 INTA4 1 Status of interrupt request for each port 0 no interrupt request active for this port 1 interrupt request active for this port Default Settings The default settings for Emerald MM are as follows Protocol settings All ports set for RS 232 Address Interrupt settings J7 ABC In In Out Feature Address Interrupt level Port 1 100 3 Port 2 108 3 Port 3 100 3 Port 4 108 3 Interrupt Status 240 2013 Diamond Systems Corp Emerald MM User Manual Revision F 00 Page 9 6 RS 485 TRANSMITTER CONTROL In an RS 485 network the same pair of wires is used for both tra
7. hrough COM4 as well as many other settings Two I O headers are provided with two 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 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 2 FEATURES 416C550 compatible serial ports with 16 byte FIFOs RS 232 RS 422 RS 485 and 1 Wire interface capability depending on the model Upto 115 2kbps in standard configuration 460 8kbps available 8different I O address options 10 different interrupt level options using 16 bit PC 104 bus extension O lines are short circuit protected Dual 20 pin I O headers 2 ports per header 5 only operation Extended temperature 40 C to 85 C operation 2013 Diamond Systems Corp Emerald MM User Manual Revision F 00 Page 3 3 MECHANICAL DRAWING 3 550 IN C 2000 DIAMOND SYSTEMS CORP EMERALD MM V4 Description of Key Elements J1 J2 J3 J4 J5 J6 J7 J8 J9 J10 J11 J12 J13 J14 J16 PC 104 8 bit bus connector PC 104 16 bit bus connector User I O he
8. may need to force some inputs true so that your software will operate correctly Jumper blocks J5 J6 J13 and J14 provide a means to force the input signals true connect them to ground or logic 0 for ports 1 4 respectively The signals that can be controlled in this fashion are CTS DCD DSR and HI To force an input signal true on a port install a jumper next to that signal s name on the corresponding header for that port Jumpers should not be installed in these locations for RS 232 operation NOTE The positions TX and RX are not used for this purpose Installing jumpers in these locations has an entirely different meaning See Cable Endpoint Termination below 5 4 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 provides 12090 resistors for this purpose To enable resistor termination install jumpers in the locations TX and RX of J5 J6 J13 or J14 for ports 1 4 respectively Termination is only needed and should only be used at the cable endpoints 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 5 5 Interrupt Levels J8 Port 1 interrupt configuration J9 Port 2 interrupt configuration J10 Port 3 interrupt configu
9. nsmit and receive signals Although any number of nodes can be listening simultaneously only one can be transmitting or have its transmitter turned on in order for valid data to be transmitted across the network On Emerald MM an RS 485 port s transmitter enable signal is controlled by that port s RTS signal The RTS signal must be asserted driven low to enable the transmitter and deasserted driven high to turn off the transmitter 7 1 WIRE INTERFACE In model EMM 1W XT a 1 Wire interface module HA7S from Point Six Inc is mounted on the board near the top edge This port converts the RS 232 signals from port 1 into 1 Wire signals The user connections for port 1 are made through a separate 4 pin header J16 on the right side of the board The port 1 signals on pins 1 10 of J3 may not be used because of conflicts with the RX line being driven by the 1 Wire interface module On model EMM 1W XT Ports 2 3 and 4 are fixed in RS 232 mode J16 1 Wire Pinout 1 5 2 Gnd 3 1 Wire 4 Gnd 2013 Diamond Systems Corp Emerald MM User Manual Revision F 00 Page 10 8 INSTALLING EMERALD MM IN WINDOWS NT 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
10. ration J11 Port 4 interrupt configuration Each serial port requires an interrupt level as well as a base I O address Four jumper blocks J8 through J11 are provided to select the interrupt level for each port from among levels 2 3 4 5 6 7 10 11 12 and 15 Install a jumper in the position corresponding to the desired interrupt level for each port Note Interrupt levels 2 7 are available on the standard 8 bit PC 104 bus header J1 If you are using an 8 bit bus these are the only levels available to you Interrupt levels 10 11 12 and 15 are available on the 16 bit PC 104 bus extension header J2 If you are using a 16 bit bus then all 10 levels are available to you Also on a system with a 16 bit bus interrupt level 2 is rerouted to level 9 5 6 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 tri states the line rather than driving it low This technique avoids contention by two devices trying to drive the line with opposing logic levels 2013 Diamond Systems Corp Emerald MM User Manual Revision F 00 Page 8 5 7 Interrupt Pulldown Resistor 5 8 5 9 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 s
11. rt 2 Port 3 Port 4 Status In In In 3F8 2F8 3E8 2E8 220 Out In In 3E8 2E8 3A8 2A8 220 In Out In 380 388 288 230 224 Out Out In 240 248 260 268 224 In In Out 100 108 110 118 240 Out In Out 120 128 130 138 244 In Out Out 140 148 150 158 248 Out Out Out 160 168 170 178 24C 5 2 Serial Protocol Selection J5 Port 1 protocol configuration J6 Port 2 protocol configuration J13 Port 3 protocol configuration J14 Port 4 protocol configuration Depending on the model you have different protocol configurations are possible For configurable versions protocol selection is made by installing jumpers in the positions indicated below in the configuration headers J5 J6 J13 and J14 For fixed protocol versions the configuration is preset with wire jumpers in these same positions RS 422 is full duplex while RS 485 is half duplex In multi drop mode the transmitter is controlled by the RTS line This feature requires software control and is not automatic Protocol 1 2 3 4 5 6 RS 232 DTE point to point Out In Out Out In Out RS 422 point to point In Out In Out Out Out RS 422 multi drop In Out In Out Out In RS 485 multi drop In Out Out In Out In 2013 Diamond Systems Corp Emerald MM User Manual Revision F 00 Page 7 5 3 Configuration for RS 422 and RS 485 Modes When RS 422 or RS 485 modes are selected not all signals are used by the line drivers and receivers Depending on your software configuration you
12. x128 Portindex REG DWORD 0 2 Sharedlnterrupts REG DWORD 0x1 Serial5 DosDevices REG_SZ COM5 ForceFifoEnable REG_DWORD 0 1 Interrupt REG_DWORD Oxc InterruptStatus REG_DWORD 0x244 PortAddress REG_DWORD 0x130 Portindex REG DWORD 0x3 Sharedlnterrupts REG DWORD 0x1 Serial6 DosDevices REG_SZ COM6 ForceFifoEnable REG_DWORD 0 1 Interrupt REG_DWORD Oxc InterruptStatus REG_DWORD 0x244 PortAddress REG_DWORD 0x138 Portindex REG DWORD 0 4 Sharedlnterrupts REG DWORD 0x1 2013 Diamond Systems Corp Emerald MM User Manual Revision F 00 Page 12 9 SPECIFICATIONS Serial Port Specifications No of serial ports Protocol Maximum baud rate Communications parameters Short circuit protection RS 232 mode Input impedance Input voltage swing Output voltage swing RS 422 RS 485 modes Differential input threshold Input impedance Input current Differential output voltage High low states differential output voltage symmetry General Specifications I O header Dimensions Power supply Current consumption Operating temperature Operating humidity PC 104 bus 2013 Diamond Systems Corp 4 RS 232 RS 422 RS 485 Jumper selected or fixed depending on the version 115kbps standard version 460 8kbps available HS option 5 6 7 or 8 data bits Even odd or no parity All outputs protected against continuous short circuit min 30V max 5V min 7V typical 0 2V min 0 2V
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