ADLINK PCIe-7300A - Manual (Page 40)

30 Registers
3.8 FIFO_CR: FIFO almost empty/full register
The register is used to control the FIFO programmable almost
empty/full flag.
Address: BASE + 0x018
Attribute: WRITE Only
Data Format:
PB_PAE_PAF (WO)
Programmable almost empty/full threshold of PORTB FIFO, 2
consecutive writes are required to program PORTB FIFO. Pro-
grammable almost empty threshold first.
PA_PAE_PAF(WO)
Programmable almost empty/full threshold of PORTA FIFO, 2
consecutive writes are required to program PORTA FIFO. Pro-
grammable almost empty threshold first.
Bits 7 6 5 4 3 2 1 0
Bit 15-0 PB_PAE_PAF
Bit 31_16 PA_PAE_PAF