RXF1C

Bit31	30	29	28	27	26	25	24
F1OM	F1WM[6:0]
AccessR/W	R/W	R/W	R/W	R/W	R/W	R/W	R/W
Reset0	0	0	0	0	0	0	0
Bit23	22	21	20	19	18	17	16
	F1S[6:0]
Access	R/W	R/W	R/W	R/W	R/W	R/W	R/W
Reset	0	0	0	0	0	0	0
Bit15	14	13	12	11	10	9	8
F1SA[15:8]
AccessR/W	R/W	R/W	R/W	R/W	R/W	R/W	R/W
Reset0	0	0	0	0	0	0	0
Bit7	6	5	4	3	2	1	0
F1SA[7:0]
AccessR/W	R/W	R/W	R/W	R/W	R/W	R/W	R/W
Reset0	0	0	0	0	0	0	0

Bit 31 – F1OM: FIFO 1 Operation Mode

FIFO 1 Operation Mode

FIFO 1 can be operated in blocking or in overwrite mode.

Value	Description
0	FIFO 1 blocking mode.
1	FIFO 1 overwrite mode.

Bits 30:24 – F1WM[6:0]: Rx FIFO 1 Watermark

Rx FIFO 1 Watermark

Value	Description
0	Watermark interrupt disabled.
1 - 64	Level for Rx FIFO 1 watermark interrupt (IR.RF1W).
>64	Watermark interrupt disabled.

Bits 22:16 – F1S[6:0]: Rx FIFO 1 Size

Rx FIFO 1 Size

The Rx FIFO 1 elements are indexed from 0 to F1S - 1.

Value	Description
0	No Rx FIFO 1
1 - 64	Number of Rx FIFO 1 elements.
>64	Values greater than 64 are interpreted as 64.

Bits 15:0 – F1SA[15:0]: Rx FIFO 1 Start Address

Rx FIFO 1 Start Address

Start address of Rx FIFO 1 in Message RAM. When the CAN module addresses the Message RAM it addresses 32-bit words, not single bytes. The configurable start addresses are 32-bit word addresses, i.e. only bits 15 to 2 are evaluated, the two least significant bits are ignored. Bits 1 to 0 will always be read back as “00”.