H8S2214 Datasheet, PDF (585/936 Pages) Renesas Technology Corp – 16-Bit Single-Chip Microcomputer H8S Family/H8S/2200 Series

Section 12 Serial Communication Interface (SCI)
Figure 12.31 shows a sample flowchart for mode transition during reception.
<Transmission>
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.
[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, watch
mode, subactive mode, and
subsleep mode.
Change
operating mode?
Yes
Initialization
No
TE = 1
<Start of transmission>
Figure 12.28 Sample Flowchart for Mode Transition during Transmission
Rev.4.00 Sep. 18, 2008 Page 525 of 872
REJ09B0189-0400