upd70f3422gj-gae-qs-ax Renesas Electronics Corporation., upd70f3422gj-gae-qs-ax Datasheet - Page 707
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upd70f3422gj-gae-qs-ax
Manufacturer Part Number
upd70f3422gj-gae-qs-ax
Description
32-bit Single-chip Microcontroller
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.UPD70F3422GJ-GAE-QS-AX.pdf
(930 pages)
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CAN Controller (CAN)
After reset: 00x000000
MUC
MOW
0
1
0
1
IE
0
1
CnMCTRLm
Note
00000000B
Message buffer overwrite status bit
The message buffer is not overwritten by a newly received data frame.
The message buffer is overwritten by a newly received data frame.
Bit indicating that message buffer data is being updated
The CAN module is not updating the message buffer (reception and storage).
The CAN module is updating the message buffer (reception and storage).
Message buffer interrupt request enable bit
Receive message buffer: Valid message reception completion interrupt disabled.
Transmit message buffer: Normal message transmission completion interrupt disabled.
Receive message buffer: Valid message reception completion interrupt enabled.
Transmit message buffer: Normal message transmission completion interrupt enabled.
Note
Note
(23)
15
0
7
0
CnMCTRLm - CANn message control register m
The CnMCTRLm register is used to control the operation of the message
buffer.
(a) Read
The MUC bit is undefined until the first reception and storage is performed.
The MOW bit is not set to 1 if a remote frame is received and stored in the
transmit message buffer with the DN bit = 1.
Preliminary User’s Manual U17566EE1V2UM00
R/W
TRQ
DN
0
1
0
1
Address: refer to “CAN registers overview“ on page 668
14
0
6
0
Message buffer transmission request bit
No message frame transmitting request that is pending or being
transmitted is in the message buffer.
The message buffer is holding transmission of a message frame pending or
is transmitting a message frame.
Message buffer data update bit
A data frame or remote frame is not stored in the message buffer.
A data frame or remote frame is stored in the message buffer.
MUC
13
5
0
MOW
12
0
4
11
IE
0
3
DN
10
0
2
TRQ
9
0
1
Chapter 19
RDY
8
0
0
707
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