2 i/o address map – CyberResearch PCIDIO 48H User Manual

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Registers Format

• 21

3.2 I/O Address Map

All the 48H registers are 8 bits. The users can access these registers
only by 8 bits I/O instructions. The following ta

ble shows the registers map,

including descriptions and their offset addresses relative to the base
address. Please refer to the chapter 4 for more detailed operation of every
registers.

Offset

Write

Read

Boards

0x00 P1A P1A PCIDIO 24H
0x01 P1B P1B PCIDIO 48H
0x02 P1C P1C PCIDIO 96H
0x03 P1Ctrl Not used

0x04 P2A P2A PCIDIO 48H
0x05 P2B P2B PCIDIO 96H
0x06 P2C P2C
0x07

P2Ctrl

Not used

0x08 P3A P3A P1AE

(1)

PCIDIO 96H

0x09

P3B

P3B

P1BE

(1)

0x0A

P3C

P3C

P1CE

(1)

(1)

doesn't apply to

0x0B P3Ctrl Not used Not used PCIDIO series
0x0C P4A P4A P2AE

(1)

0x0D

P4B

P4B

P2BE

(1)

0x0E

P4C

P4C

P2CE

(1)

0x0F

P4Ctrl

Not used

Not used

0x10 Timer/Counter #0 Timer/Counter #0 PCIDIO 24H
0x11 Timer/Counter #1 Timer/Counter #1 PCIDIO 48H
0x12 Timer/Counter #2 Timer/Counter #2 PCIDIO 96H

0x13

Timer/Counter
Mode Control

Timer/Counter
Mode Status

not applicable

0x20

ISC: Interrupt
Source Control

Not used

0x30

Clear Interrupt

Not used

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