ST STM32F412 User Manual

RM0402 Rev 6 953/1163
RM0402 Controller area network (bxCAN)
966
This register also implements the TX request control (bit 0) - reset value 0.
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
STID[10:0]/EXID[28:18] EXID[17:13]
rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw
1514131211109876543210
EXID[12:0] IDE RTR TXRQ
rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw
Bits 31:21 STID[10:0]/EXID[28:18]: Standard identifier or extended identifier
The standard identifier or the MSBs of the extended identifier (depending on the IDE bit
value).
Bit 20:3 EXID[17:0]: Extended identifier
The LSBs of the extended identifier.
Bit 2 IDE
: Identifier extension
This bit defines the identifier type of message in the mailbox.
0: Standard identifier.
1: Extended identifier.
Bit 1 RTR
: Remote transmission request
0: Data frame
1: Remote frame
Bit 0 TXRQ: Transmit mailbox request
Set by software to request the transmission for the corresponding mailbox.
Cleared by hardware when the mailbox becomes empty.

ST STM32F412 Specifications

General

Brand	ST
Model	STM32F412
Category	Microcontrollers
Language	English