ADLINK PCIe-7300A - Manual (Page 60)

50 Operation Theory
fer.The operations sequence of digital input with handshaking 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 input sampling rate as handshaking mode.
Connect the handshaking signals of the external device
to input pin DI-REQ and output pin DI-ACK.
4. Define the starting mode to be NoWait or WaitTRIG.
5. After digital input data is ready on device side, the
peripheral device strobe data into the cPCI/PCI/PCIe-
7300A by asserting a DIREQ signal,
6. The DIREQ signal caused the cPCI/PCI/PCIe-7300A to
latch digital input data and store it into FIFO
7. The cPCI/PCI/PCIe-7300A asserts a DIACK signal when
it is ready for another input, the step 5 to step 7 will be
repeated again.
8. The data saved in FIFO will transfer to system memory
of your computer directly and automatically by bus mas-
tering DMA.
The operation flow is show as below: