NEC 78K0S/KA1+ User Manual page 200

Figure 11-16 shows an example of the continuous transmission processing flow.
Figure 11-16. Example of Continuous Transmission Processing Flow
Remark TXB6:
ASIF6: Asynchronous serial interface transmission status register 6
TXBF6: Bit 1 of ASIF6 (transmit buffer data flag)
TXSF6: Bit 0 of ASIF6 (transmit shift register data flag)
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CHAPTER 11 SERIAL INTERFACE UART6
Set registers.
Write TXB6.
Transfer
executed necessary
number of times?
No
Read ASIF6
TXBF6 = 0?
Yes
Write TXB6.
Transmission
completion interrupt
occurred?
Yes
Transfer
executed necessary
number of times?
No
Transmit buffer register 6
User's Manual U16898EJ3V0UD
Yes
No
No
Yes
Read ASIF6
TXSF6 = 0?
Yes
Yes
Completion of
transmission processing
No