UPD78F0890GK(A)-GAJ-AX NEC, UPD78F0890GK(A)-GAJ-AX Datasheet - Page 501

• 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

Cautions 1. The TRQ bit should be set after the RDY bit is set.
Remark Also check the MBON flag at the beginning and at the end of the polling routine, in order to check the
2. The RDY bit and TRQ bit should not be set at the same time.
access to the message buffers as well as TX 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.
Set C0MDATAxm register
Set C0MDLCm register
Clear RTR bit of C0MCONFm
register.
Set C0MIDLm and C0MIDHm
registers
Figure 16-46. Transmission via Software Polling
Data frame
No
CHAPTER 16 CAN CONTROLLER
User’s Manual U17554EJ4V0UD
Read C0TGPT register
Clear CINTS0 bit
Clear TOVF bit
remote frame?
Yes
Clear RDY bit
Data frame or
CINTS0 = 1?
Set RDY bit
Set TRQ bit
THPM = 1?
TOVF = 1?
RDY = 0?
START
END
Yes
Yes
Yes
Set C0MDLCm register
Set RTR bit of C0MCONFm
Set C0MIDLm and C0MIDHm
registers
Remote frame
No
No
No
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