UPD78F0890GK(A)-GAJ-AX NEC, UPD78F0890GK(A)-GAJ-AX Datasheet - Page 502

• 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

502
Note There is a possibility of starting the transmission without being aborted even if TRQ bit is cleared,
Cautions 1.
Figure 16-47. Transmission Abort Processing (Except Normal Operation Mode with ABT)
because the transmission request to protocol layer might already been accepted between 11 bits,
total of interframe space (3 bits) and suspend transmission (8 bits).
2.
3.
4.
Execute transmission request abort processing by clearing the TRQ bit, not the RDY
bit.
Before making a sleep mode transition request, confirm that there is no transmission
request left using this processing.
The TSTAT bit can be periodically checked by a user application or can be checked
after the transmit completion interrupt.
Do not execute the new transmission request including in the other message buffers
while transmission abort processing is in progress.
be aborted matches C0LOPT
Wait for 11 CAN data bits
Transmission successful
Read C0LOPT register
Message buffer to
Clear TRQ bit
TSTAT = 0?
register?
START
END
CHAPTER 16 CAN CONTROLLER
Yes
Yes
User’s Manual U17554EJ4V0UD
Note
No
No
Transmit abort request
was successful