NEC V850ES/F 3-L Series User Manual page 595

CAN Controller (CAN)
(23)
Access
Address
Initial Value
CnMCTRLm - CANn message control register m
The CnMCTRLm register is used to control the operation of the message
buffer.
This register can be read/written in 16-bit units.
Refer to "CAN registers overview" on page 555.
00x0 0000 0000 0000
B
(a) CnMCTRLm read
15 14
0 0
7 6
0 0
a
MUC Bit indicating that message buffer data is being updated
The CAN module is not updating the message buffer (reception and
0
storage).
The CAN module is updating the message buffer (reception and
1
storage).
a)
The MUC bit is undefined until the first reception and storage is performed.
a
MOW Message buffer overwrite status bit
0 The message buffer is not overwritten by a newly received data frame.
1 The message buffer is overwritten by a newly received data frame.
a)
The MOW bit is not set to 1 even if a remote frame is received and stored in the
transmit message buffer with the DN bit = 1.
IE Message buffer interrupt request enable bit
Receive message buffer: Valid message reception completion interrupt
disabled.
0
Transmit message buffer: Normal message transmission completion
interrupt disabled.
Receive message buffer: Valid message reception completion interrupt
enabled.
1
Transmit message buffer: Normal message transmission completion
interrupt enabled.
DN Message buffer data update bit
0 A data frame or remote frame is not stored in the message buffer.
1 A data frame or remote frame is stored in the message buffer.
User's Manual U18743EE1V2UM00
. The register is initialized by any reset.
13 12 11
MUC 0 0
5 4 3
0 MOW IE
Chapter 18
10 9 8
0 0 0
2 1 0
DN TRQ RDY
595