ADLINK cPCI-7300 - Manual (Page 46)

38 • Operation Theory
8. The data saved in FIFO will transfer to system memory of your computer
directly and automatically by bus mastering DMA.
The operation flow is show as below:
The following figure shows the timing requirement of the handshaking mode
digital input operation.
DIREQ & DIACK Handshaking
Note: DIREQ must be asserted until DIACK asserts, DIACK will be asserted
until DIREQ de-asserted.