ST STM32F40 Series Reference Manual page 698

RM0090
Bits 31:24 DATA7[7:0]
Data byte 7 of the message.
Note: If TGT of this message and TTCM are active, DATA7 and DATA6 will be replaced by the
Bits 23:16 DATA6[7:0]
Bits 15:8 DATA5[7:0]
Data byte 5 of the message.
Bits 7:0 DATA4[7:0]
Data byte 4 of the message.
CAN receive FIFO mailbox identifier register (CAN_RIxR) (x=0..1)
Address offsets: 0x1B0, 0x1C0
Reset value: 0xXXXX XXXX
All RX registers are write protected.
31 30 29
r r r
15 14 13
r r r
Bits 31:21 STID[10:0]/EXID[28:18]
Bits 20:3 EXID[17:0]
Bit 2 IDE
Bit 1 RTR
Bit 0 Reserved, must be kept at reset value.
:
Data byte 7
TIME stamp value.
:
Data byte 6
Data byte 6 of the message.
:
Data byte 5
:
Data byte 4
28 27 26 25
STID[10:0]/EXID[28:18]
r r r r
12 11 10 9
EXID[12:0]
r r r r
:
Standard identifier or extended identifier
The standard identifier or the MSBs of the extended identifier (depending on the IDE bit
value).
:
Extended identifier
The LSBs of the extended identifier.
:
Identifier extension
This bit defines the identifier type of message in the mailbox.
0: Standard identifier.
1: Extended identifier.
:
Remote transmission request
0: Data frame
1: Remote frame
Doc ID 018909 Rev 4
Controller area network (bxCAN)
24 23 22 21
r r r r
8 7 6 5
r r r r
20 19 18 17
EXID[17:13]
r r r r
4 3 2 1
IDE RTR
r r r r
16
r
0
Res.
698/1422