AT32WB415
Series Reference Manual
2022.04.13
Page 287
Ver 2.00
19.7.2.4 Transmit mailbox data high register (CAN_TMDTHx) (x=0..2)
All the bits in the register are write protected when the mailbox is not in empty state.
Bit
Register
Reset value
Type
Description
Bit 31: 24 TMDT7
0xXX
rw
Transmit mailbox data byte 7
Bit 23: 16 TMDT6
0xXX
rw
Transmit mailbox data byte 6
Note: This field will be replaced with MTS[15: 8] when the
time-triggered communication mode is enabled and the
corresponding time stamp transmit is enabled.
Bit 15: 8
TMDT5
0xXX
rw
Transmit mailbox data byte 5
Bit 7: 0
TMDT4
0xXX
rw
Transmit mailbox data byte 4
19.7.2.5 Receive FIFO mailbox identifier register (CAN_RFIx) (x=0..1)
Note: All the receive mailbox registers are read only.
Bit
Register
Reset value
Type
Description
Bit 31: 21 RFSID/RFEID
0xXXX
ro
Receive FIFO standard identifier or receive FIFO extended
identifier
Note: This field defines the 11-bit high bytes of the
standard identifier or extended identifier.
Bit 20: 3
RFEID
0xXXXXX
ro
Receive FIFO extended identifier
Note: This field defines the 18-bit low bytes of the extended
identifier.
Bit 2
RFIDI
0xX
ro
Receive FIFO identifier type indication
0: Standard identifier
1: Extended identifier
Bit 1
RFFRI
0xX
Ro
Receive FIFO frame type indication
0: Data frame
1: Remote frame
Bit 0
Reserved
0x0
resd
Kept at its default value
19.7.2.6 Receive FIFO mailbox data length and time stamp register
(CAN_RFCx) (x=0..1)
Note: All the receive mailbox registers are read only.
Bit
Register
Reset value
Type
Description
Bit 31: 16 RFTS
0xXXXX
ro
Receive FIFO time stamp
Note: This field contains the value of the CAN timer
sampled at the start of a receive frame.
Bit 15: 8
RFFMN
0xXX
ro
Receive FIFO filter match number
Note: This field contains the filter number that a message
has passed through.
Bit 7: 4
Reserved
0xX
resd
Kept at its default value
Bit 3: 0
RFDTL
0xX
ro
Receive FIFO data length
Note: This field defines the data length of a receive
message. A transmit message can contain from 0 to 8 data
bytes. For a remote frame, its data length RFDTl is fixed 0.
19.7.2.7 Receive FIFO mailbox data low register (CAN_RFDTLx)
(x=0..1)
Note: All the receive mailbox registers are read only.
Bit
Register
Reset value
Type
Description
Bit 31: 24 RFDT3
0xXX
ro
Receive FIFO data byte 3
Bit 23: 16 RFDT2
0xXX
ro
Receive FIFO data byte 2
Bit 15: 8
RFDT1
0xXX
ro
Receive FIFO data byte 1
Bit 7: 0
RFDT0
0xXX
ro
Receive FIFO data byte 0