38.8.31 Rx FIFO 1 Configuration

This register is write-restricted and only writable if bit fields CCCR.CCE = 1 and CCCR.INIT = 1.
Name: RXF1C
Offset: 0xB0
Reset: 0x00000000
Property: Write-restricted

Bit 3130292827262524 
 F1OMF1WM[6:0] 
Access R/WR/WR/WR/WR/WR/WR/WR/W 
Reset 00000000 
Bit 2322212019181716 
  F1S[6:0] 
Access R/WR/WR/WR/WR/WR/WR/W 
Reset 0000000 
Bit 15141312111098 
 F1SA[15:8] 
Access R/WR/WR/WR/WR/WR/WR/WR/W 
Reset 00000000 
Bit 76543210 
 F1SA[7:0] 
Access R/WR/WR/WR/WR/WR/WR/WR/W 
Reset 00000000 

Bit 31 – F1OM FIFO 1 Operation Mode

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

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

ValueDescription
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

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

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”.