ADLINK PCIe-7300A - Manual (Page 41)

Registers 31
3.9 POL_CNTRL: Control Signal Polarity Control
Register
The register is used to control the control signals’ polarity. The
control signals include DI_REQ, DI_ACK, DI_TRG, DO_REQ,
DO_ACK and DO_TRG.
Address: BASE + 0x1C
Attribute: READ/WRITE
Data Format:
DI_REQ_NEQ (R/W)
X 0: DI_REQ is rising edge active
X 1: DI_REQ is falling edge active
DI_ACK_NEQ (R/W)
X 0: DI_ACK is rising edge active
X 1: DI_ACK is falling edge active
DI_TRG_NEQ (R/W)
X 0: DI_TRG is rising edge active
X 1: DI_TRG is falling edge active
DO_REQ_NEQ (R/W)
X 0: DO_REQ is rising edge active
X 1: DO_REQ is falling edge active
DO_ACK_NEQ (R/W)
X 0: DO_ACK is rising edge active
X 1: DO_ACK is falling edge active
DO_TRG_NEQ (R/W)
X 0: DO_TRG is rising edge active
X 1: DO_TRG is falling edge active
Bit # 3-0 DO_REG_NEG DI_TRG_NEG DI_ACK_NEG DI_REQ_NEG
Bit # 71-4 - - DO_TRG_NEG DO_ACK_NEG
Bit # 31-8 Don’t Care