ADLINK PCIe-7360 - Manual (Page 52)

42 Operations
nal (DI-REQ and DI-ACK) of external device to the AFI3
and AFI4.
X Define DI starting mode configuration (NoWait or WaitTRIG)
Z If choose WaitTRIG, you can define start trigger source
to be software trigger or external trigger (DI-Start or
DI-TRIG) from AFI0 to AFI7.
X
Define DI data count
Step2: Execute DI DMA Read Command (handshake mode)
X After DI data is ready on device side, the peripheral device
strobe data into the PCIe-7360 by asserting a DI-REQ sig-
nal. (action_1)
X
The DI-REQ signal caused the PCIe-7360 to latch DI data
and store it into DI FIFO. (action_2)
X
The PCIe-7360 asserts a DI-ACK signal when it is ready for
another input. (action_3)
Z
The action_1 to action_3 is repeated in handshake
mode.
X
The DI data in the DI FIFO is transferred into system mem-
ory directly and automatically by bus mastering DMA.
The operating architecture of DI DMA in handshake mode is as
shown.