Renesas H8S/2319 series Hardware Manual page 516

<Reception>
Read RDRF flag in SSR
RDRF = 1
Yes
Read receive data in RDR
RE = 0
Transition to software
standby mode, etc.
Exit from software
standby mode, etc.
Change
operating mode?
Yes
Initialization
<Start of reception>
Figure 12-26 Sample Flowchart for Mode Transition during Reception
Rev. 5.00, 12/03, page 486 of 1088
No [1] [1] Receive data being received
[2] Includes module stop mode.
[2]
No
RE = 1
becomes invalid.