ST STM32F205 series Reference Manual page 828

Controller area network (bxCAN)
CAN receive FIFO mailbox data length control and time stamp register
(CAN_RDTxR) (x=0..1)
Address offsets: 0x1B4, 0x1C4
Reset value: 0xXXXX XXXX
All RX registers are write protected.
31 30 29
r r r
15 14 13
r r r
Bits 31:16 TIME[15:0]
Bits 15:8 FMI[7:0]
Bits 7:4 Reserved, must be kept at reset value.
Bits 3:0 DLC[3:0]
828/1378
28 27 26 25
r r r r
12 11 10 9
FMI[7:0]
r r r r
:
Message time stamp
This field contains the 16-bit timer value captured at the SOF detection.
:
Filter match index
This register contains the index of the filter the message stored in the mailbox passed
through. For more details on identifier filtering refer to
Filter Match Index paragraph.
:
Data length code
This field defines the number of data bytes a data frame contains (0 to 8). It is 0 in the case
of a remote frame request.
24 23 22
TIME[15:0]
r r r
8 7 6
Reserved
r
RM0033 Rev 8
21 20 19 18
r r r r
5 4 3 2
DLC[3:0]
r r
Section 27.7.4: Identifier filtering
RM0033
17 16
r r
1 0
r r
-