CHAPTER 5 CLOCK GENERATOR
Preliminary User’s Manual U16846EJ1V0UD
102
5.8.2 Switching from high-speed system clock to Ring-OSC clock
Figure 5-16. Switching from High-Speed System Clock to Ring-OSC Clock (Flowchart)
MCM.1 (MCS) is changed from 1 to 0
; Ring-OSC clock operation
; Ring-OSC oscillating?
Ring-OSC clock operation
; High-speed system clock operation
No: RSTOP = 0
Yes: RSTOP = 1
MCM = 03H
RCM.0
Note
(RSTOP) = 1?
RSTOP = 0
MCM0
←
0
Register setting
in high-speed system
clock operation
High-speed system
clock operation
Ring-OSC
clock operation
Note Required only when “can be stopped by software” is selected for Ring-OSC by the option byte.