UPD78F0838 Renesas Electronics Corporation., UPD78F0838 Datasheet - Page 646

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

644
Figure 15-43 shows the processing for a transmit message buffer (MT [2:0] bits of C0MCONFm register = 000B).
Caution The ABTTRG bit should be set to 1 after the TSTAT bit is cleared to 0. Checking the TSTAT
Remark
bit and setting the ABTTRG bit to 1 must be processed continuously.
This processing (normal operation mode with ABS) can only be applied to message buffers 0 to 7.
For message buffers other than the ABT message buffers, refer to Figure 15-42.
Transmit Processing.
Figure 15-43. ABT Message Transmit Processing
Set all ABT transmit messages?
Set C0MDATAxm register
Set C0MDLCm register
Clear RTR bit of C0MCONFm
register
Set C0MIDLm and C0MIDHm
registers
Preliminary User’s Manual U19748EJ1V0UD
CHAPTER 15 CAN CONTROLLER
Set ABTTRG bit
ABTTRG = 0?
Clear RDY bit
Set RDY bit
TSTAT = 0?
RDY = 0?
START
END
Yes
Yes
Yes
Yes
No
No
No
No
Message