WIR (CAN) Register

Zynq UltraScale+ Devices Register Reference (UG1087)

Document ID
UG1087
Release Date
2024-03-13
Revision
1.10

WIR (CAN) Register Description

Register NameWIR
Offset Address0x000000002C
Absolute Address 0x00FF06002C (CAN0)
0x00FF07002C (CAN1)
Width32
TyperwNormal read/write
Reset Value0x00003F3F
DescriptionRx and Tx Watermark Settings.

The TXFIFO Empty watermark (EW) programmed in this register will be applied to TX FIFO only. The RXFIFO Full watermark (FW) programmed in this register will be applied to RX FIFO only. The watermark register is allowed to program only when CEN=0 in SRR register. The TXFIFO Watermark EMPTY interrupt (TXFWMEMP) will continue to assert as long as the number of empty spaces in the TX FIFO is greater than the TXFIFO Empty watermark (EW). The RXFLL interrupt will continue to assert as long as the RX FIFO count remains above the RXFIFO Full watermark (FW).

WIR (CAN) Register Bit-Field Summary

Field NameBitsTypeReset ValueDescription
Reserved31:16rwNormal read/write0x0reserved
EW15:8rwNormal read/write0x3FTXFIFO Empty watermark
TXFIFO generates an EMPTY interrupt based on the value programmed in this field. The valid range is (1-63). No protection is given for illegal programming in this field. This field can be written to only when CEN bit in SRR is 0.
FW 7:0rwNormal read/write0x3FRXFIFO Full watermark
RXFIFO generates FULL interrupt based on the value programmed in this field. The valid range is (1-63). No protection is given for illegal programming in this field. This field can be written to only when CEN bit in SRR is 0.