UPD78F0890GK(A)-GAJ-AX NEC, UPD78F0890GK(A)-GAJ-AX Datasheet - Page 507

• 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

Note Check the MUC and DN bits using one read access.
Remark Also check the MBON flag at the beginning and at the end of the interrupt routine, in order to check
the access to the message buffers as well as reception history list registers, in case a pending sleep
mode had been executed. If MBON is detected to be cleared at any check, the actions and results
of the processing have to be discarded and processed again, after MBON is set again.
It is recommended to cancel any sleep mode requests, before processing RX interrupts.
END
Figure 16-52. Reception via Interrupt (Using C0RGPT Register)
Yes
CHAPTER 16 CAN CONTROLLER
Read C0MDATAxm , C0MDLCm,
C0MIDLm, C0MIDHm registers
User’s Manual U17554EJ4V0UD
Read C0RGPT register
Generation of receive
completion interrupt
Correct data is read
Clear ROVF bit
Clear DN bit
ROVF = 1?
RHPM = 1?
,
MUC = 0
START
DN = 0
AND
Yes
Yes
No
,
Note
,
No
No
Illegal data is read
507