upd70f3422gj-gae-qs-ax Renesas Electronics Corporation., upd70f3422gj-gae-qs-ax Datasheet - Page 747

• Manufacturer Part Number: upd70f3422gj-gae-qs-ax
• Description: 32-bit Single-chip Microcontroller
• Manufacturer: Renesas Electronics Corporation.

CAN Controller (CAN)
Figure 19-36
Caution
Message buffer initialization
1.
2.
Preliminary User’s Manual U17566EE1V2UM00
Before a message buffer is initialized, the RDY bit must be cleared.
Make the following settings for message buffers not used by the application.
•
•
Clear the CnMCTRLm.RDY, CnMCTRLm.TRQ, and CnMCTRLm.DN
bits to 0.
Clear the CnMCONFm.MA0 bit to 0.
No
CnMCTRLm register.
CnMCONFm register.
CnMDATAm register.
CnMDLCm register.
CnMIDHm register,
CnMIDLm register.
Transmit message
Clear RDY
Clear RDY
Set RDY
Set RDY
Clear RDY bit.
RDY
RDY
Set RDY bit.
Yes
START
buffer?
Clear
Set
END
Set
Set
Set
bit
bit
Yes
= 1?
Yes
bit
bit
= 0?
bit
bit
= 1
= 0
= 0
= 1
No
No
Chapter 19
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