UPD78F0890GK(A)-GAJ-AX NEC, UPD78F0890GK(A)-GAJ-AX Datasheet - Page 494

• 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

494
Cautions 1. Before a message buffer is initialized, the RDY bit must be cleared.
2. Make the following settings for message buffers not used by the application.
- Clear the RDY, TRQ, and DN bits of the C0MCTRLm register to 0.
- Clear the MA0 bit of the C0MCONFm register to 0.
Figure 16-39. Message Buffer Initialization
No
CHAPTER 16 CAN CONTROLLER
User’s Manual U17554EJ4V0UD
Transmit message buffer?
C0MCONFm register
C0MIDHm register,
C0MDATAm register
C0MCTRLm
C0MDLCm
C0MIDLm register
Clear RDY bit
Yes
RDY = 0?
Set RDY bit
RDY = 1?
START
START
Clear
Set
Set
END
Set
Set
Yes
Yes
register
register
No
No