Acces I/O products PCI-IDO-48A, Руководство пользователя

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Manual PCI-IDO-48A Series
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Chapter 5: Programming
The base address is assigned by the computer system during installation and will fall on an
eight-byte boundary. The cards read and write functions are as follows:
Address Write Read
Base A0 Port 0 Bits 0-7
Base A1 Port 0 Bits 8-15
Base A2 Port 1 Bits 0-7
Base A3 Trigger Control Trigger Status
Base A4 Port 1 Bits 8-15
Base A5 Port 2 Bits 0-7
Base A6 Port 2 Bits 8-15
Base A7 Trigger Over-run Count
Table 5-1: Register Address Map
Base A 0 (write) Port0 Low Byte
Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0
P0_7 P0_6 P0_5 P0_4 P0_3 P0_2 P0_1 P0_0
Writing to this address updates the data on Port0 bits 0-7. The data is updated instantly to the
outputs in Immediate Mode and updated on a rising edge of the External Trigger in External
Trigger Mode. Refer to Base A 3 for Immediate and External Trigger Modes.
Base A 1 (write) Port0 High Byte
Bit15 Bit14 Bit13 Bit12 Bit11 Bit10 Bit9 Bit8
P0_15 P0_14 P0_13 P0_12 P0_11 P0_10 P0_9 P0_8
Writing to this address updates the data on Port0 bits 8-15. The data is updated instantly to
the outputs in Immediate Mode and updated on a rising edge of the External Trigger in
External Trigger Mode. Refer to Base A 3 for Immediate and External Trigger
Modes.
Base A 2 (write) Port1 Low Byte
Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0
P1_7 P1_6 P1_5 P1_4 P1_3 P1_2 P1_1 P1_0
Writing to this address updates the data on Port1 bits 0-7. The data is updated instantly to the
outputs in Immediate Mode and updated on a rising edge of the External Trigger in External
Trigger Mode. Refer to Base A 3 for Immediate and External Trigger Modes.