Datasheet

39.8.34 Rx Buffer / FIFO Element Size Configuration
Name: RXESC
Offset: 0xBC
Reset: 0x00000000
Property: Write-restricted
This register is write-restricted and only writable if bit fields CCCR.CCE = 1 and CCCR.INIT = 1.
Configures the number of data bytes belonging to an Rx Buffer / Rx FIFO element. Data field sizes >8
bytes are intended for CAN FD operation only.
Bit 31 30 29 28 27 26 25 24
Access
Reset
Bit 23 22 21 20 19 18 17 16
Access
Reset
Bit 15 14 13 12 11 10 9 8
RBDS[2:0]
Access
R/W R/W R/W
Reset 0 0 0
Bit 7 6 5 4 3 2 1 0
F1DS[2:0] F0DS[2:0]
Access
R/W R/W R/W R/W R/W R/W
Reset 0 0 0 0 0 0
Bits 10:8 – RBDS[2:0] Rx Buffer Data Field Size
In case the data field size of an accepted CAN frame exceeds the data field size configured for the
matching Rx Buffer, only the number of bytes as configured by RXESC are stored to the Rx Buffer
element. The rest of the frame’s data field is ignored.
Value Name Description
0x0
DATA8 8 byte data field.
0x1
DATA12 12 byte data field.
0x2
DATA16 16 byte data field.
0x3
DATA20 20 byte data field.
0x4
DATA24 24 byte data field.
0x5
DATA32 32 byte data field.
0x6
DATA48 48 byte data field.
0x7
DATA64 64 byte data field.
Bits 6:4 – F1DS[2:0] Rx FIFO 1 Data Field Size
In case the data field size of an accepted CAN frame exceeds the data field size configured for the
matching Rx FIFO 1, only the number of bytes as configured by RXESC are stored to the Rx FIFO 1
element. The rest of the frame’s data field is ignored.
SAM D5x/E5x Family Data Sheet
CAN - Control Area Network
© 2019 Microchip Technology Inc.
Datasheet
DS60001507E-page 1285