Fifo status register – ADLINK PCI-9810 User Manual

Page 36

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24

Registers

FIFO Status Register

Monitors some of the PCI-9812/9810 status.

Address: BASE + 18h

Attribute: Read

Data Format:

Bit

7

6

5

4

3

2

1

0

BASE+18h

ACQ

TD

PTCO

FIFOOR FIFOHF

FIFOIR

BASE+19h

BASE+1Ah

BASE+1Bh

Bit 0

FIFOIR, FIFO input ready flag.
0: FIFO is not ready for input; FIFO is full.
1: FIFO is ready for input (not full).

Bit 1

FIFOHF, FIFO half full flag.
0: FIFO is not half-full yet.
1: FIFO is at least half-full.

Bit 2

FIFOOR, FIFO output ready flag
0: FIFO is not ready for output; FIFO is empty.
1: FIFO is ready for output (not empty).

Bit 3

PTC0, post trigger counter is 0
0: Post trigger counter is not 0.
1: Post trigger counter reached 0.

Bit 4

TD, trigger detection flag
0: No trigger condition has been met; no trigger is detected.
1: Trigger is detected.

Bit 5

ACQ, acquisition flag
0: Card is not acquiring data. Card maybe disabled or is waiting
for a trigger.
1: Card is acquiring data.

Bit 6..31

Any value

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