UPD78F0890GK(A)-GAJ-AX NEC, UPD78F0890GK(A)-GAJ-AX Datasheet - Page 498

• Manufacturer Part Number: UPD78F0890GK(A)-GAJ-AX
• Description: 8BIT MCU, 128K FLASH, 7K RAM, LQFP
• Manufacturer: NEC

Specifications of UPD78F0890GK(A)-GAJ-AX

• Controller Family/series: UPD78F
• No. Of I/o's: 55
• Ram Memory Size: 7KB
• Cpu Speed: 20MHz
• No. Of Timers: 10
• No. Of Pwm: RoHS Compliant
• Core Size: 8bit
• Program Memory Size: 128KB
• Oscillator Type: External, Internal

498
Figure 16-43 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 16-42.
Figure 16-43. 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
CHAPTER 16 CAN CONTROLLER
User’s Manual U17554EJ4V0UD
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