ADLINK PCIe-7300A - Manual (Page 38)

28 Registers
3.6 DI_FIFO: DI FIFO direct access port
The digital input FIFO data can be accessed through this port
directly.
Address: BASE + 0x10
Attribute: READ/WRITE
Data Format:
DI_FIFO_8
Bit 7 - Bit 0 of digital input FIFO
DI_FIFO_16
Bit 15 - Bit 8 of digital input FIFO if the digital input is configured
as 16-bit wide or 32-bit wide.
DI_FIFO_32
Bit 31 - Bit 16 of digital input FIFO if the digital input is config-
ured as 32-bit wide
Note: Although this port is R/W port, write operation should be
avoided in normal operation. If both PORT A and PORT B
are configured as output ports, read/write to this port is
meaningless.
Bits 7 6 5 4 3 2 1 0
Bit # 7-0 DI_FIFO_8
Bit # 15-8 DI_FIFO_16
Bit # 31_16 DI_FIFO_32