Hardware manual

Microcomputer Technical Q&A
119
2. Performing first byte setting at the same time as SCI setting
SCI setting processing
Interrupt wait
Counter setting: count = 1
TE = 1
Clear TDRE (start transfer)
*
TIE = 1 (enable empty interrupt)
As 1st data byte is stored in
TDR by software, counter is
set to 1.
Set 1st byte in TDR
Note: * After the data is transferred from TDR to TSR, TDRE is set to 1.