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Registers Format

3.2 I/O Address Map

All the 724X registers are 8 bits. The users can access these registers only

by 8 bits I/O instructions. The following table shows the registers map,

including descriptions and their offset addresses relative to the base address.

Please refer to chapter 4 of this manual for a more detailed description on the

operation of different registers.

Offset Write Read Boards

0x00 P1A P1A PCI-7224

0x01 P1B P1B PCI-7248

0x02 P1C P1C PCI-7296

0x03 P1Ctrl Not used cPCI-7248/49R

0x04 P2A P2A PCI-7248

0x05 P2B P2B PCI-7296

0x06 P2C P2C cPCI-7248/49R

0x07 P2Ctrl Not used

0x08 P3A P3A P1AE

(1)

PCI-7296

0x09 P3B P3B P1BE

(1)

0x0A P3C P3C P1CE

(1)

for

0x0B P3Ctrl Not used Not used cPCI-7249R

0x0C P4A P4A P2AE

(1)

Only

0x0D P4B P4B P2BE

(1)

0x0E P4C P4C P2CE

(1)

0x0F P4Ctrl Not used Not used

0x10 Timer/Counter #0 Timer/Counter #0 PCI-7224

0x11 Timer/Counter #1 Timer/Counter #1 PCI-7248

0x12 Timer/Counter #2 Timer/Counter #2 PCI-7296

0x13

Timer/Counter

Mode Control

Timer/Counter

Mode Status

cPCI-7248/49R

0x20

ISC: Interrupt

Source Control

Not used

0x30 Clear Interrupt Not used

1 2 ... 27 28 29 30 31 32 33 34 35 36 37 ... 58 59

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