Datasheet

Table 39-15. Extended Message ID Filter Element
31 3
0
29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
F0
EFEC
[2:0]
EFID1[28:0]
F1
EFT
[1:0]
EFID2[28:0]
• F0 Bits 31:29 - EFEC[2:0]: Extended Filter Element Configuration
All enabled filter elements are used for acceptance filtering of extended frames. Acceptance filtering
stops at the first matching enabled filter element or when the end of the filter list is reached. If EFEC
= “100”, “101”, or “110” a match sets interrupt flag IR.HPM and, if enabled, an interrupt is generated.
In this case register HPMS is updated with the status of the priority match.
Table 39-16. Extended Filter Element Configuration
Value Name Description
0x0 DISABLE Disable filter element.
0x1 STF0M Store in Rx FIFO 0 if filter matches.
0x2 STF1M Store in Rx FIFO 1 if filter matches.
0x3 REJECT Reject ID if filter matches.
0x4 PRIORITY Set priority if filter matches.
0x5 PRIF0M Set priority and store in FIFO 0 if filter matches.
0x6 PRIF1M Set priority and store in FIFO 1 if filter matches.
0x7 STRXBUF Store into Rx Buffer or as debug message, configuration of EFT[1:0] ignored.
• F0 Bits 28:0 - EFID1[28:0]: Extended Filter ID 1
First ID of extended ID filter element.
When filtering for Rx Buffers or for debug messages this field defines the ID of a extended mesage to
be stored. The received identifiers must match exactly, only XIDAM masking mechanism is used.
• F1 Bits 31:30 - EFT[1:0]: Extended Filter Type
This field defines the extended filter type.
Table 39-17. Extended Filter Type
Value Name Description
0x0 RANGEM Range filter from EFID1 to EFID2 (EFID2 >= EFID1).
0x1 DUAL Dual ID filter for EFID1 or EFID2.
0x2 CLASSIC Classic filter: EFID1 = filter, EFID2 = mask.
0x3 RANGE Range filter from EFID1 to EFID2 (EFID2 >= EFID1), XIDAM mask not applied.
• F1 Bits 28:0 - EFID2[28:0]: Extended Filter ID 2
SAM D5x/E5x Family Data Sheet
CAN - Control Area Network
© 2019 Microchip Technology Inc.
Datasheet
DS60001507E-page 1309