NEC V850E/Dx3 Preliminary User's Manual page 705

CAN Controller (CAN)
After reset: Undefined
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(21) CnMCONFm - CANn message configuration register m
The CnMCONFm register is used to specify the type of the message buffer
and to set a mask.
R/W Address: refer to "CAN registers overview" on page 668
7
CnMCONFm OWS RTR
OWS
0
1
Note 1. The "message buffer that has already received a data frame" is a receive
message buffer whose the CnMCTRLm.DN bit has been set to 1.
2. A remote frame is received and stored, regardless of the setting of the
OWS and DN bits. A remote frame that satisfies the other conditions (ID
matches, the RTR bit = 0, the CnMCTRLm.TRQ bit = 0) is always received
and stored in the corresponding message buffer (interrupt generated, DN
flag set, the CnMDLCm.MDLC0 to CnMDLCm.MDLC3 bits updated, and
recorded to the receive history list).
RTR
0
1
Note The RTR bit specifies the type of message frame that is transmitted from a
message buffer defined as a transmit message buffer. Even if a valid remote
frame has been received, the RTR bit of the transmit message buffer that has
received the frame remains cleared to 0. Even if a remote frame whose ID
matches has been received from the CAN bus with the RTR bit of the transmit
message buffer set to 1 to transmit a remote frame, that remote frame is not
received or stored (interrupt generated, DN flag set, the MDLC0 to MDLC3 bits
updated, and recorded to the receive history list).
MT2
0
0
0
0
1
1
Other than above
Preliminary User's Manual U17566EE1V2UM00
6 5 4
MT2 MT1
Overwrite control bit
Note
The message buffer that has already received a data frame is not
overwritten by a newly received data frame. The newly received data
frame is discarded.
The message buffer that has already received a data frame is overwritten
by a newly received data frame.
Note
Remote frame request bit
Transmit a data frame.
Transmit a remote frame.
MT1 MT0 Message buffer type setting bit
0 0 Transmit message buffer
0 1 Receive message buffer (no mask setting)
1 0 Receive message buffer (mask 1 set)
1 1 Receive message buffer (mask 2 set)
0 0 Receive message buffer (mask 3 set)
0 1 Receive message buffer (mask 4 set)
Setting prohibited
Chapter 19
3 2 1
MT0 0 0
0
MA0
705