Datasheet

507
Start transmitting
Initialize
Read TDRE bit in SSR
Read TEND bit in SSR
Clear TE bit in SCR to 0;
select theTxD pin as an
output port with the PFC
TEND = 1?
End transmission
1
2
3
No
Yes
TDRE = 1?
Write transmission data to TDR
and clear TDRE bit in SSR to 0
All data transmitted?
No
Yes
Output break signal?
No
Yes
Set DR = 0
4
Yes
No
Figure 14.5 Sample Flowchart for Transmitting Serial Data