D12320VF25IV Datasheet, PDF (695/1304 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

<Transmission>
Section 14 Serial Communication Interface (SCI)
All data
transmitted?
Yes
No [1]
Read TEND flag in SSR
TEND = 1?
Yes
TE = 0
No
[2]
Transition to software
standby mode, etc.
[3]
Exit from software
standby mode, etc.
Change
No
operating mode?
Yes
Initialization
[1] Data being transmitted is interrupted.
After exiting software standby mode,
etc., normal CPU transmission is
possible by setting TE to 1, reading
SSR, writing TDR, and clearing
TDRE to 0, but note that if the DTC
has been activated, the remaining
data in DTCRAM will be transmitted
when TE and TIE are set to 1.
[2] If TIE and TEIE are set to 1, clear
them to 0 in the same way.
[3] Includes module stop mode.
TE = 1
<Start of transmission>
Figure 14.23 Sample Flowchart for Mode Transition during Transmission
Rev.6.00 Sep. 27, 2007 Page 663 of 1268
REJ09B0220-0600