H8S20103 Datasheet, PDF (162/992 Pages) Renesas Technology Corp – 16-Bit Single-Chip Microcomputer H8S Family / H8S/Tiny Series

Section 5 Clock Pulse Generator
φOSC
OSCHLT
BAKCLK
φbase
Operation at main oscillator clock
φOSC stops
Clock
switching
time
Operation at backup destination clock
[Legend]
φOSC: Main oscillator clock
OSCHLT: Main oscillator clock stop detection signal
BAKCLK: Backup destination clock
φbase: System base clock
Figure 5.10 Timing of Backup Operation When Main Oscillator Stops at Low Level
(When the backup destination clock is active)
Rev. 1.00 Oct. 03, 2008 Page 136 of 962
REJ09B0465-0100