UPD78F0890GK(A)-GAJ-AX NEC, UPD78F0890GK(A)-GAJ-AX Datasheet - Page 497

• 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

Figure 16-42 shows the processing for a transmit message buffer (MT [2:0] bits of C0MCONFm register = 000B).
Cautions 1. The TRQ bit should be set after the RDY bit is set.
Set C0MDATAxm register
Set C0MDLCm register
Clear RTR bit of C0MCONFm
register
Set C0MIDLm and C0MIDHm
registers
2. The RDY bit and TRQ bit should not be set at the same time.
Data frame
Figure 16-42. Message Transmit Processing
CHAPTER 16 CAN CONTROLLER
User’s Manual U17554EJ4V0UD
Data frame or remote frame?
Set RDY bit
Set TRQ bit
Clear RDY bit
TRQ = 0?
RDY = 0?
END
START
Yes
Yes
No
No
Set C0MDLCm register
Set RTR bit of C0MCONFm
register
Set C0MIDLm and C0MIDHm
registers
Remote frame
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