UPD78F0890GK(A)-GAJ-AX NEC, UPD78F0890GK(A)-GAJ-AX Datasheet - Page 503

8BIT MCU, 128K FLASH, 7K RAM, LQFP

UPD78F0890GK(A)-GAJ-AX

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

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
Note There is a possibility of starting the transmission without being aborted even if TRQ bit is cleared,
Cautions 1.
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).
Figure 16-48. Transmission Abort Processing Except for ABT Transmission
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
Transmission successful
Read C0LOPT register
Clear ABTTRG bit
Message buffer to
ABTTRG = 0?
Clear TRQ bit
TSTAT = 0?
register?
START
(Normal Operation Mode with ABT)
END
CHAPTER 16 CAN CONTROLLER
Yes
Yes
Yes
User’s Manual U17554EJ4V0UD
Note
No
No
No
Transmit abort request
Transmit abort request
was successful
was successful
503

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