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Chapter 18
18.7 Control Registers
(1)
Access
Address
Initial Value
Caution
Note
562
CnGMCTRL - CANn global control register
The CnGMCTRL register is used to control the operation of the CAN module.
This register can be read/written in 16-bit units.
<CnRBaseAddr> + 000
0000
. The register is initialized by any reset.
H
(a) CnGMCTRL read
15
14
MBON
0
7
6
0
0
Bit enabling access to message buffer register, transmit/receive
MBON
history registers
Write access and read access to the message buffer register and
0
the transmit/receive history list registers is disabled.
Write access and read access to the message buffer register and
1
the transmit/receive history list registers is enabled.
1.
While the MBON bit is cleared (to 0), software access to the message
buffers (CnMDATA0m, CnMDATA1m, CnMDATA01m, CnMDATA2m,
CnMDATA3m, CnMDATA23m, CnMDATA4m, CnMDATA5m, CnMDATA45m,
CnMDATA6m, CnMDATA7m, CnMDATA67m, CnMDLCm, CnMCONFm,
CnMIDLm, CnMIDHm, and CnMCTRLm), or registers related to transmit
history or receive history (CnLOPT, CnTGPT, CnLIPT, and CnRGPT) is
disabled.
2.
This bit is read-only. Even if 1 is written to the MBON bit while it is 0, the
value of the MBON bit does not change, and access to the message buffer
registers, or registers related to transmit history or receive history remains
disabled.
The MBON bit is cleared (to 0) when the CAN module enters CAN sleep mode/
CAN stop mode, or when the GOM bit is cleared (to 0).
The MBON bit is set (to 1) when the CAN sleep mode/CAN stop mode is
released, or when the GOM bit is set (to 1).
EFSD
Bit enabling forced shut down
Forced shut down by GOM bit = 0 disabled.
0
Forced shut down by GOM bit = 0 enabled.
1
User's Manual U18743EE1V2UM00
H
13
12
11
0
0
0
5
4
3
0
0
0
CAN Controller (CAN)
10
9
8
0
0
0
2
1
0
0
EFSD
GOM
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