CHAPTER 5 CLOCK GENERATOR
User’s Manual U16899EJ2V0UD
133
5.8.3 Switching from high-speed system clock to subsystem clock
Figure 5-16. Switching from High-Speed System Clock to Subsystem Clock (Flowchart)
MCS = 1 not changed.
CLS is changed from 0 to 1.
; Subsystem clock operation
Subsystem clock operation
; High-speed system clock oscillation
; High-speed system clock or Ring-OSC clock
; High-speed system clock operation
PCC.7 (MCC) = 0
PCC.4 (CSS) = 0
MCM = 03H
CSS
←
1
Note
Register setting
in high-speed system
clock operation
High-speed system
clock operation
Subsystem
clock
Note Set CSS to 1 after confirming that oscillation of the subsystem clock is stabilized.