VersaLogic STD32 VL-1225 Reference Manual
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VersaLogic STD32 VL-1225 Reference Manual

Analog input/output cards for the std bus
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Summary of Contents for VersaLogic STD32 VL-1225

  • Page 1 (217) 352-9330 | Click HERE Find the Versalogic VL1225 at our website:...
  • Page 2 Doc. Rev. 10/30/02 NOTICE: Although every effort has been made to ensure this documentation is error-free, VersaLogic makes no representations or warranties with respect to this product and specifically disclaims any implied warranties of merchantability or fitness for any particular purpose.
  • Page 3 VL-1225/6 Analog Input/Output Board...

  • Page 4: Table Of Contents

    Table of Contents Table of Contents 1. Overview Introduction ..............1-1 Features .
  • Page 5 Table of Contents 4. Registers Introduction ..............4-1 Register Mapping .

  • Page 6: Overview

    Overview Overview This manual details the installation and operation of VersaLogic’s VL-1225 and VL-1226 analog I/O cards. The VL-1225 card includes both analog input and output channels. The VL-1226 includes the same analog input channels, but no output channels. Both cards provide 10- or 11-bit input resolution.

  • Page 7: Specifications

    Overview – Specifications Specifications Specifications are typical at 25°C with 5.0V supply unless otherwise noted. ANALOG INPUT (VL-1225 and VL-1226) Number of Channels: 16 single-ended or 8 differential Range: 0 to +10V, ±5V, ±10V Resolution: 10 bits (1024 counts) RTI-1225/6 Compatible Mode 11 bits (2048 counts) VL-1225/6 Extended Mode Conversion Time: 25 µs + settling time Settling Time: 15 µs...

  • Page 8: Configuration

    Configuration Configuration Jumper Options Various options available on the VL-1225/6 cards are selected using removable jumper blocks (shorting plugs). Features are selected or deselected by installing or removing the jumpers as noted. The terms “In” or “Jumpered” are used to indicate an installed plug: “Out” or “Open” are used to indicate a removed plug.

  • Page 9: Vl-1225 Jumper Block Locations

    Configuration – Jumper Options VL-1225 Jumper Block Locations Figure 2-1. Jumper Block Locations for VL-1225 VL-1225/6 Analog Input/Output Board...

  • Page 10: Vl-1225 Jumper Options

    Configuration – Jumper Options VL-1225 Jumper Options Jumper Jumper Jumper Jumper Jumper Block Block Block Block Block Description Description Description Description Description Shipped Shipped Shipped Shipped Shipped Page Page Page Page Page Channel 0 Output Voltage Range (see also V16) ..........±10V 2-18 = In, = In...

  • Page 11: Vl-1226 Jumper Block Locations

    Configuration – Jumper Options VL-1226 Jumper Block Locations Figure 2-3. Jumper Block Locations for VL-1226 VL-1225/6 Analog Input/Output Board...

  • Page 12: Vl-1226 Jumper Options

    Configuration – Jumper Options VL-1226 Jumper Options Jumper Jumper Jumper Jumper Jumper Block Block Block Block Block Description Description Description Description Description Shipped Shipped Shipped Shipped Shipped Page Page Page Page Page 1225 Only ................— —...

  • Page 13: Board Addressing

    Configuration – Board Addressing Board Addressing The VL-1225/6 supports 8-, 10-, and 16-bit I/O addressing, and 16-bit memory addressing. 8-bit I/O addressing is used with most 8-bit processors (Z80, 8085, 6809, etc.) which provide 256 I/O addresses. 10- or 16-bit addressing can be used with 16-bit processors (8088, 80188, 80186, etc.) to decode 1024 or 65536 I/O port addresses.

  • Page 14: 8-Bit I/O Addressing

    Configuration – Board Addressing 8-Bit I/O Addressing To configure the board for an 8-bit I/O address refer to the figure below. Use the table to select the jumpering for the appropriate upper and lower halves of the desired starting address (i.e., “3” and “0” = hex address 30).

  • Page 15: 10-Bit I/O Addressing

    Configuration – Board Addressing 10-Bit I/O Addressing To configure the board for a 10-bit I/O address refer to the figure below. Use the table to select the jumpering for the appropriate upper, middle, and lower hex digits of the desired starting address (i.e., “1” and “3”...

  • Page 16: 16-Bit I/O Addressing

    Configuration – Board Addressing 16-Bit I/O Addressing To configure the board for a 16-bit I/O address refer to the figure below. See the table to select the jumpering for the appropriate four hex digits of the desired starting address (i.e., “6” and “1” and “3” and “0”...

  • Page 17: Ioexp Signal

    Configuration – Board Addressing IOEXP Signal The IOEXP (I/O expansion) signal on the STD Bus is normally used to select between two different I/O banks or maps. It can be used to double the number of available I/O addresses in the system (by selecting between two banks of I/O boards).

  • Page 18: 16-Bit Memory Addressing

    Configuration – Board Addressing 16-Bit Memory Addressing To configure the board for a 16-bit memory address refer to the figure below. Use the table to select the jumpering for the appropriate four hex digits of the desired starting address (i.e., “6” and “1” and “3” and “0”...

  • Page 19: Memex Signal

    Configuration – Board Addressing MEMEX Signal The MEMEX (memory expansion) signal on the STD Bus is normally used to select between two different memory banks or maps. It can be used to double the number of available memory addresses in the system (by selecting between the two memory banks).

  • Page 20: Analog Input Configuration

    Configuration – Analog Input Configuration Analog Input Configuration The VL-1225/6 board accommodates 16 single-ended or 8 differential channels. Input Mode The VL-1225/6 board can be configured for three types of voltage inputs: differential, single-ended, and pseudo-differential. In addition, by adding an external user-supplied 500 W resistor, the VL-1225/6 can be hooked up to a 4-20 ma current loop.

  • Page 21: Pseudo-Differential Mode

    Configuration – Analog Input Configuration Pseudo-Differential Mode The pseudo-differential mode is used for signals that are not referenced to ground, but are all connected to a single common return line. This mode can provide most of the advantages of full differential input while requiring fewer total wires.

  • Page 22: Current Loop Mode

    Configuration – Analog Input Configuration Current Loop Mode While the VL-1225/6 cannot directly hook up to a 4-20 ma current loop, the addition of an external user- supplied 500 W precision dropping resistor can be used to develop a 2-10 volt signal proportional to the 4- 20 ma current.

  • Page 23: Input Voltage Range

    Configuration – Analog Input Configuration Input Voltage Range The board may be operated with an input range of 0 to +10 volts, ±10 volts, or ±5 volts. The 0 to +10 volt range is preferred for signals which do not go negative, since the per volt resolution is twice that of the ±10 volt range.

  • Page 24: Input Data Format

    Configuration – Analog Input Configuration Input Data Format The digital data format for the analog input channels can be jumpered for binary, offset binary, or two’s complement. The configuration affects all channels. The selection is dependent upon the input voltage range selected with jumper V3. Unipolar voltages should use the binary data format.

  • Page 25: Analog Output Configuration

    Configuration – Analog Output Configuration Analog Output Configuration The VL-1225 board accommodates two analog output channels. Both output channels are single-ended and are referenced to analog ground. Output Voltage Range Each output channel can be configured independently to produce output voltage ranges of 0 to +10 volts, ±5 volts, or ±10 volts as shown below.

  • Page 26: Output Data Format

    Configuration – Analog Output Configuration Output Data Format The digital data format for the analog output channels can be jumpered for binary, offset binary, or two’s complement. Each channel can be configured independently. The selection is dependent upon the output voltage range selected with jumpers V1 and V2. Unipolar voltages should use the binary data format.

  • Page 27: Output Power-Up Voltage

    Configuration – Analog Output Configuration Output Power-Up Voltage Jumper V16 is provided to force the output voltage of both channels to zero volts when the VL-1225 powers up or the CPU is reset. The jumper position is dependent upon the output range and output data format. Refer to the table below for the proper configuration.

  • Page 28: Interrupt Configuration

    Configuration – Interrupt Configuration Interrupt Configuration Jumper V15 connects the interrupt request signal from the VL-1225/6 card to one of four STD Bus interrupt request lines. The choice of which jumper position to choose depends upon the capabilities of the CPU or interrupt controller used in the system. If an STD 32 Slot X interrupt controller is used, interrupts are requested on the dedicated slot specific signal IRQx (E47).
  • Page 29 2-22 VL-1225/6 Analog Input/Output Board...

  • Page 30: Installation

    Installation Installation Handling CAUTION: The VL-1225/6 card uses chips which are sensitive to static electricity discharges. Normal precautions, such as discharging yourself, work stations, and tools to ground before touching the board should be taken whenever the board is handled. The board should also be protected during shipment or storage by placing it in a conductive bag (such as the one it was received in) or by wrapping it in metal foil.

  • Page 31: External Connections

    Installation – External Connections External Connections J1 is an unlatched 34-pin dual-row (.1" center) header type connector. External connections to the VL- 1225/6 can be made with standard cable assemblies, or with the following mating connectors: Mating Connectors Connector Mating Connector 34-pin socket type connectors such as 3M #3414-6634 Figure 3-1.

  • Page 32: Connector Pinout

    Installation – External Connections Connector Pinout J1 — Analog Input/Output Connector Single Ended or J1 Pin Pseudo-Differential Differential Channel 0 Channel 0– Channel 8 Channel 0+ Analog Ground Analog Ground Channel 9 Channel 1+ Channel 1 Channel 1 Analog Ground Analog Ground Channel 2 Channel 2–...
  • Page 33 Installation – External Connections All “low side” pseudo-differential analog voltages are connected PD — Pseudo Differential “Low Side”. together and brought to this pin for differential reference. These signals are the 8-bit analog output signals from the two D/A DAC0, DAC1 — Analog Outputs. converters (VL-1225 only).

  • Page 34: Registers

    The locations of the eight ports are determined by the board address, which is jumper selectable. For compatibility with Analog Devices RTI-1225/6 boards, VersaLogic ships the VL-1225/6 jumpered to memory address FF08H. However, most users configure the board using I/O mapping rather than memory mapping.

  • Page 35: Analog Input Registers

    Registers – Analog Input Registers Analog Input Registers Input Channel Select Register Input Channel Select Register (SELECT) — FF0BH Figure 4-2. Input Channel Select Register The Channel Select register is a write register used to select the input channel number to be read. Writing a channel number to this register initiates a conversion cycle.

  • Page 36: Input Data Low Register

    Registers – Analog Input Registers Input Data Low Register Input Data Low Register (IDLOW) — FF0CH Figure 4-4. Input Data Low Register The Input Data Low register is a read register containing the lower 8 bits of data from the A/D conversion results.

  • Page 37: Input Data Representation

    Registers – Analog Input Registers Input Data Representation The format of the data read from the board varies depending on the input range and the data format that is selected. Each of the data formats is discussed below. Input Binary Format (10-Bit Resolution) Binary format is used only with the unipolar 0 to +10V input range.

  • Page 38: Input Binary Format (11-Bit Resolution)

    Registers – Analog Input Registers Input Binary Format (11-Bit Resolution) Binary format is used only with the unipolar 0 to +10V input range. 11-bit binary format divides the full 10 Volt analog input range into 2048 steps of 4.88 mV each. The code 0000H is associated with an analog input voltage of 0 Volts (ground).

  • Page 39: Input Offset Binary Format (10-Bit Resolution)

    Registers – Analog Input Registers Input Offset Binary Format (10-Bit Resolution) Offset binary format is used with the bipolar ±5 or ±10V input ranges. 10-bit offset binary format divides the full bipolar analog input range into 1024 steps. The code 0000H is associated with the most negative voltage, i.e.

  • Page 40: Input Offset Binary Format (11-Bit Resolution)

    Registers – Analog Input Registers Input Offset Binary Format (11-Bit Resolution) Offset binary format is used with the bipolar ±5 or ±10V input ranges. 11-bit offset binary format divides the full bipolar analog input range into 2048 steps. The code 0000H is associated with the most negative voltage, i.e.

  • Page 41: Input Two's Complement Format (10-Bit Resolution)

    Registers – Analog Input Registers Input Two’s Complement Format (10-Bit Resolution) Two’s complement format is used with the bipolar ±5 or ±10V input ranges. 10-bit two’s complement format, like 10-bit offset binary format, divides the full bipolar analog input range into 1024 steps. The code 0000H, however, is associated with an analog input voltage of 0 Volts (ground).

  • Page 42: Input Two's Complement Format (11-Bit Resolution)

    Registers – Analog Input Registers Input Two’s Complement Format (11-Bit Resolution) Two’s complement format is used with the bipolar ±5 or ±10V input ranges. 11-bit two’s complement format, like 11-bit offset binary format, divides the full bipolar analog input range into 2048 steps. The code 0000H, however, is associated with an analog input voltage of 0 Volts (ground).

  • Page 43: Analog Output Registers

    Registers – Analog Output Registers Analog Output Registers Output Data Registers Channel 0 (OD0) — FF0EH Channel 1 (OD1) — FF0FH Figure 4-11. Output Data Registers The Output Data registers are write only registers used for D/A conversion. One register is assigned for each output channel.

  • Page 44: Output Offset Binary Format

    Registers – Analog Output Registers Output Offset Binary Format Offset binary format is used with the bipolar ±5 or ±10V output ranges. It divides the full bipolar analog output range into 256 steps. The code 00H produces a negative full scale output, and the largest code (FFH) produces a positive full scale output.

  • Page 45: Output Two's Complement Format

    Registers – Analog Output Registers Output Two’s Complement Format Two’s Complement format is used with the ±5V or the ±10V output ranges. It divides the full bipolar analog output range into 256 steps. The code 00H produces an analog output of 0 Volts. Positive digital values produce positive analog output voltages, and negative digital values produce negative analog output voltages.

  • Page 46: Interrupt Registers

    Registers – Interrupt Registers Interrupt Registers Interrupt Control Register Interrupt Control Register (ICTRL) — FF08H Figure 4-15. Interrupt Control Register The Interrupt Control register is a write register used to enable and disable conversion-complete interrupts. These bits have no function in the VL-1225/6. It does not matter what value is written X —...
  • Page 47 4-14 VL-1225/6 Analog Input/Output Board...

  • Page 48: Operation

    Operation Operation This section describes how to operate the VL-1225/6. Two typical input modes of operation, polled mode, and interrupt mode are discussed, as well as a discussion of output mode. Code examples written in 80188 assembly language are included in the next section. Polled Mode Analog Input Polled mode operation is the simplest method of operating the VL-1225/6 for analog input.

  • Page 49: Interrupt Mode Analog Input

    Operation – Interrupt Mode Analog Input Interrupt Mode Analog Input Interrupt mode eliminates the need to repeatedly poll the Status register while waiting for the A/D conversion to complete. This frees up the CPU to execute unrelated code while the VL-1225/6 is busy with an A/D conversion.

  • Page 50: Software Examples

    This section shows some software examples written in Microsoft MASM 5.0 assembly language to assist you in constructing your own software routines. The interrupt code example is written specifically for use with VersaLogic’s 80188 CPU card, VL-188. Polled Mode Analog Input The following example reads channel 0 into the AX register.

  • Page 51: Interrupt Mode Analog Input

    Software Examples – Interrupt Mode Analog Input Interrupt Mode Analog Input The following code example shows how to operate the VL-1225/6 using interrupts. This specific example requests an A/D conversion from channel 0. When the data is ready, an interrupt is generated causing the DONE flag to be set.
  • Page 52 Software Examples – Interrupt Mode Analog Input 0012 read: 0012 C7 06 0002 R 0000 done,0 ;Clear done flag 0018 BA 0303 dx,select ;Select channel 0 and Trigger 001B B0 00 al,00h 001D EE dx,al ;Unrelated CPU code can be ;executed here.
  • Page 53 Software Examples – Interrupt Mode Analog Input 004C isr: ;INTERRUPT SERVICE ROUTINE 004C 50 push ;Save CPU registers 004D 51 push 004E 52 push 004F 1E push 0050 B8 ---- R ax,data ;Set data segment register 0053 8E D8 ds,ax ;Read A/D results 0055 BA 0305 dx,idhigh...

  • Page 54: Analog Output

    Software Examples – Analog Output Analog Output The following example outputs zero volts to D/A channel 1. It is assumed that the board is addressed at I/O location 0300H, and the output channel is jumpered for two’s complement format. The key program section is: Outputs the value 80h (zero volts) to D/A channel number 1.
  • Page 55 VL-1225/6 Analog Input/Output Board...

  • Page 56: Reference

    Reference Reference Specifications Specifications are typical at 25°C with 5.0V supply unless otherwise noted. ANALOG INPUT (VL-1225 and VL-1226) Number of Channels: 16 single-ended or 8 differential Range: 0 to +10V, ±5V, ±10V Resolution: 10 bits (1024 counts) RTI-1225/6 Compatible Mode 11 bits (2048 counts) VL-1225/6 Extended Mode Conversion Time: 25 µs + settling time Settling Time: 15 µs...

  • Page 57: Vl-1225 Jumper Block Locations

    Reference – VL-1225 Jumper Block Locations VL-1225 Jumper Block Locations Figure 7-1. Jumper Block Locations for VL-1225 VL-1225/6 Analog Input/Output Board...
  • Page 58 Reference – VL-1225 Jumper Block Locations VL-1225 Jumper Options Jumper Jumper Jumper Jumper Jumper Block Block Block Block Block Description Description Description Description Description Shipped Shipped Shipped Shipped Shipped Page Page Page Page Page Channel 0 Output Voltage Range (see also V16) ..........±10V 2-18 = In, = In...

  • Page 59: Vl-1226 Jumper Block Locations

    Reference – VL-1226 Jumper Block Locations VL-1226 Jumper Block Locations Figure 7-3. Jumper Block Locations for VL-1226 VL-1225/6 Analog Input/Output Board...
  • Page 60 Reference – VL-1226 Jumper Block Locations VL-1226 Jumper Options Jumper Jumper Jumper Jumper Jumper Block Block Block Block Block Description Description Description Description Description Shipped Shipped Shipped Shipped Shipped Page Page Page Page Page 1225 Only ................— —...

  • Page 61: Register Map

    The locations of the eight ports are determined by the board address, which is jumper selectable. For compatibility with Analog Devices RTI-1225/6 boards, VersaLogic ships the VL-1225/6 jumpered to memory address FF08H. However, most users configure the board using I/O mapping rather than memory mapping.

  • Page 62: Calibration

    Reference – Calibration Calibration The VL-1225/6 is calibrated before shipment. However, it may be desirable to recalibrate the card after installation, and approximately once each year (depending on the accuracy requirements of the application). Required Equipment • A voltmeter with resolution and accuracy to ½ LSB of the input range being used. •...

  • Page 63: Output Calibration (Vl-1225 Only)

    Reference – External Connections Output Calibration (VL-1225 only) • Disconnect all inputs and outputs from the card and connect the voltmeter to channel 0. • Referring to the table below, select the column which matches the output range and data format of the channel being calibrated.

  • Page 64: Physical Pin Locations

    Reference – External Connections Physical Pin Locations Figure 7-10. I/O Connector Physical Pin Locations Connector Pinout The table below shows the pinout for the analog I/O connector. See page 3-3 for detailed information. J1 — Analog Input/Output Connector Single Ended or J1 Pin Pseudo-Differential Differential...

  • Page 65: Decimal / Hex / Ascii Conversion Chart

    Reference – Decimal / Hex / ASCII Conversion Chart Decimal / Hex / ASCII Conversion Chart The chart below is useful for both ASCII and decimal / hex conversion. The “^” symbol denotes control characters. “^A” represents control-A, etc. Dec. Hex ASCII Dec.

  • Page 66: Std 80 Bus Pinout

    Reference – STD 80 Bus Pinout STD 80 Bus Pinout COMPONENT SIDE SOLDER SIDE Signal Flow Description Signal Flow Description +5VDC Logic Power +5VDC Logic Power Logic Ground Logic Ground VBAT — Battery Power DCPDN* — DC Power Down A19/D3 Address/Data A23/D7 Address/Data...

  • Page 67: Std 32 Bus Pinout Extension

    Reference – STD 32 Bus Pinout Extensions STD 32 Bus Pinout Extension COMPONENT SIDE SOLDER SIDE Signal Flow Description Signal Flow Description — Logic Ground RSVD — Reserved XA19 — Address XA23 — Address XA18 — Address XA22 — Address XA17 —...

  • Page 68: Vl-1225 Parts Placement Diagram

    Reference – VL-1225 Parts Placement Diagram VL-1225 Parts Placement Diagram Figure 7-15. VL-1225 parts Placement Diagram 7-13 VL-1225/6 Analog Input/Output Board...

  • Page 69: Vl-1225 Schematic

    Reference – VL-1225 Schematic VL-1225 Schematic 03/09/93 REV3 7-14 VL-1225/6 Analog Input/Output Board...
  • Page 70 Reference – VL-1225 Schematic VL-1225 Schematic 03/09/93 REV3 7-15 VL-1225/6 Analog Input/Output Board...
  • Page 71 Reference – VL-1225 Schematic VL-1225 Schematic 03/09/93 REV3 7-16 VL-1225/6 Analog Input/Output Board...

  • Page 72: Vl-1225 Parts List

    Reference – VL-1225 Parts List VL-1225 Parts List Rev. 3.03 Capacitors Capacitors Capacitors Capacitors Capacitors C1-C4,C7-C12,C13-C16,C18-C20 C22,C24,C25-C28,C30-C38 .1 µf Z5U C5,C6,C21,C23,C39 270 pf NPO 10 µf, 16V tantalum 100 µf 6.3V Elect., radial 22 µf 25V Elect., radial Inductors Inductors Inductors Inductors Inductors...
  • Page 73 Reference – VL-1225 Parts List Semiconductors Semiconductors Semiconductors Semiconductors Semiconductors LM336Z-2.5 D2,D3 1N4148 Miscellaneous Miscellaneous Miscellaneous Miscellaneous Miscellaneous +5V to ±15V DC/DC (HPR105) 34 pin R/A header U1,U2 8 pin DIP socket U8,U9 16 pin DIP socket 28 pin DIP socket V1,V2,V5,V6 2 x 2 pin straight header V3,V4,V13,V15...

  • Page 74: Vl-1226 Parts Placement Diagram

    Reference – VL-1226 Parts Placement Diagram VL-1226 Parts Placement Diagram Figure 7-16. VL-1226 parts Placement Diagram 7-19 VL-1225/6 Analog Input/Output Board...

  • Page 75: Vl-1226 Schematic

    Reference – VL-1226 Schematic VL-1226 Schematic 03/09/93 REV3 7-20 VL-1225/6 Analog Input/Output Board...
  • Page 76 Reference – VL-1226 Schematic VL-1226 Schematic 03/09/93 REV3 7-21 VL-1225/6 Analog Input/Output Board...
  • Page 77 Reference – VL-1226 Schematic VL-1226 Schematic 03/09/93 REV3 7-22 VL-1225/6 Analog Input/Output Board...

  • Page 78: Vl-1226 Parts List

    Reference – VL-1226 Parts List VL-1226 Parts List Rev. 3.03 Capacitors Capacitors Capacitors Capacitors Capacitors C1,C3,C4,C7-C12,C14-C16,C18-C20 C22,C24,C25-C28,C30-C38 .1 µf Z5U C21,C23,C39 270 pf NPO 10 µf, 16V tantalµm 100 µf, 6.3V electrolytic 22 µf 25V electrolytic Inductors Inductors Inductors Inductors Inductors L1,L2 10 µH, 250 mA...
  • Page 79 Reference – VL-1226 Parts List Semiconductors Semiconductors Semiconductors Semiconductors Semiconductors D2,D3 1N4148 Miscellaneous Miscellaneous Miscellaneous Miscellaneous Miscellaneous +5V to ±15V DC/DC (HPR105) 34 pin R/A header U8,U9 16 pin DIP socket 28 pin DIP socket V5,V6 2 x 2 pin straight header V3,V4,V13,V15 2 x 4 pin straight header V8,V10...

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