SH7032 Datasheet, PDF (409/687 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer

Section 13 Serial Communication Interface (SCI)
Initialize
(1)
Start transmitting
Read TDRE bit in SSR
(2)
No
TDRE = 1?
Yes
Write transmit data in TDR and
clear TDRE bit to 0 in SSR
(3)
No
All data transmitted?
Yes
Read TEND bit in SSR
No
TEND = 1?
Yes
Output break signal?
Yes
Set DR = 0
No
(4)
Clear TE bit of SCR to 0;
Select theTxD pin function
as an output port with the PFC
Transmission ends
Figure 13.5 Sample Flowchart for Transmitting Serial Data
Rev. 7.00 Jan 31, 2006 page 383 of 658
REJ09B0272-0700