FlexCAN RM0046
542/936 Doc ID 16912 Rev 5
22.3.4 Registers description
The FlexCAN registers are described in this section in ascending address order.
Module Configuration Register (MCR)
This register defines global system configurations, such as the module operation mode
(e.g., low power) and maximum message buffer configuration. Most of the fields in this
register can be accessed at any time, except the MAXMB field, which should only be
changed while the module is in Freeze Mode.
Table 272. Rx FIFO Structure field description
Field Description
REM
Remote Frame
This bit specifies if Remote Frames are accepted into the FIFO if they match the target ID.
0 Remote Frames are rejected and data frames can be accepted.
1 Remote Frames can be accepted and data frames are rejected.
EXT
Extended Frame
Specifies whether extended or standard frames are accepted into the FIFO if they match the
target ID.
0 Extended frames are rejected and standard frames can be accepted.
1 Extended frames can be accepted and standard frames are rejected.
RXIDA
Rx Frame Identifier (Format A)
Specifies an ID to be used as acceptance criteria for the FIFO. In the standard frame format, only
the 11 most significant bits (3 to 13) are used for frame identification. In the extended frame
format, all bits are used.
RXIDB_0
RXIDB_1
Rx Frame Identifier (Format B)
Specifies an ID to be used as acceptance criteria for the FIFO. In the standard frame format, the
11 most significant bits (a full standard ID) (3 to 13) are used for frame identification. In the
extended frame format, all 14 bits of the field are compared to the 14 most significant bits of the
received ID.
RXIDC_0
RXIDC_1
RXIDC_2
RXIDC_3
Rx Frame Identifier (Format C)
Specifies an ID to be used as acceptance criteria for the FIFO. In both standard and extended
frame formats, all 8 bits of the field are compared to the 8 most significant bits of the received ID.
To Next Page
Loading...
