H8S2116 Datasheet, PDF (445/842 Pages) Renesas Technology Corp – Renesas 16-Bit Single-Chip Microcomputer H8S Family / H8S/2100 Series

Section 13 Serial Communication Interface (SCI)
(2) Reception
Before making the transition to module stop, software standby, watch, sub-active, or sub-sleep
mode, stop reception (RE = 0). RSR, RDR, and SSR are reset. If transition is made during data
reception, the data being received will be invalid.
To receive data in the same reception mode after mode cancellation, set RE to 1, and then start
reception. To receive data in a different reception mode, initialize the SCI first.
Figure 13.36 shows a sample flowchart for mode transition during reception.
Reception
Read RDRF flag in SSR
RDRF = 1
Yes
Read receive data in RDR
No [1]
RE = 0
Make transition to
[2]
software standby mode etc.
Cancel software standby mode etc.
[1] Data being received will be invalid.
[2] Module stop, watch, sub-active, and sub-
sleep modes are included.
Change operating mode?
Yes
Initialization
No
RE = 1
Start reception
Figure 13.36 Sample Flowchart for Mode Transition during Reception
Rev. 1.00 Mar. 02, 2006 Page 405 of 798
REJ09B0255-0100