UPD78F0838 Renesas Electronics Corporation., UPD78F0838 Datasheet - Page 642

• Manufacturer Part Number: UPD78F0838
• Description: 8-bit Single-chip Microcontrollers
• Manufacturer: Renesas Electronics Corporation.

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Cautions 1. Before a message buffer is initialized, the RDY bit must be cleared.
2. Make the following settings for message buffers not used by the application.
- Clear the RDY, TRQ, and DN bits of the C0MCTRLm register to 0.
- Clear the MA0 bit of the C0MCONFm register to 0.
Figure 15-39. Message Buffer Initialization
No
Preliminary User’s Manual U19748EJ1V0UD
CHAPTER 15 CAN CONTROLLER
Transmit message buffer?
C0MCONFm register
C0MIDHm register,
C0MDATAm register
C0MCTRLm
C0MDLCm
C0MIDLm register
Clear RDY bit
Yes
Set RDY bit
RDY = 0?
RDY = 1?
START
START
Clear
Set
Set
END
Set
Set
Yes
Yes
register
register
No
No