Datasheet

525
Start transmitting
Read TDRE flag in SSR
TDRE = 1?
Write transmit data in TDR and
clear TDRE flag to 0 in SSR
All data transmitted?
Read TEND flag in SSR
Yes
No
No
No
Yes
TEND = 1?
Yes
End
Clear TE bit to 0 in SCR
Initialize
2
3
1
Figure 14.18 Sample Flowchart for Serial Transmitting