ADLINK PCIe-7300A - Manual (Page 65)

Operation Theory 55
The operations sequence of digital output in handshaking mode
are listed:
1. Define the input configuration to be 32-bit, 16-bit or 8-bit
data width.
2. Enable or disable the active terminators.
3. Define the output clock mode as handshaking mode.
Connect the handshaking signals of the external device
to output pin DO-REQ and input pin DO-ACK.
4. Define the starting mode to be NoWait, WaitTRIG, Wait-
FIFO, or WaitBoth
5. Digital output data is moved from PC’s system memory
to output FIFO by using bus mastering DMA.
6. After output data is ready. A DO-REQ signal is gener-
ated and sent the output data to the external device.
7. After a DO-ACK signal is gotten, the step 6 and step 7
will be repeated again
The operation flow is show as below: