NEC V850ES/KE1+ User Manual page 412

Set registers
Write transmit data to
TXBn register
When reading
No
ASIFn register,
TXBFn = 0?
Write second byte transmit
data to TXBn register
412
CHAPTER 14 ASYNCHRONOUS SERIAL INTERFACE (UART)
Figure 14-4. Continuous Transmission Processing Flow
Yes
Interrupt occurrence
number of transfers
No
Write transmit data to
TXBn register
Wait for interrupt
User's Manual U16896EJ2V0UD
Required
Yes
performed?
No
When reading
ASIFn register,
TXSFn = 1?
Yes
End of transmission
When reading
No
ASIFn register,
TXSFn = 0?
Yes
processing