upd78f0114m6gb-8es Renesas Electronics Corporation., upd78f0114m6gb-8es Datasheet - Page 124

• Manufacturer Part Number: upd78f0114m6gb-8es
• Description: 8-bit Single-chip Microcontrollers
• Manufacturer: Renesas Electronics Corporation.

5.8.3 Switching from X1 input clock to subsystem clock
124
Note Set CSS to 1 after confirming that oscillation of the subsystem clock is stabilized.
clock operation
Subsystem
X1 input
clock
Figure 5-16. Switching from X1 Input Clock to Subsystem Clock (Flowchart)
Register setting
clock operation
in X1 input
CHAPTER 5 CLOCK GENERATOR
User’s Manual U16227EJ3V0UD
Subsystem clock operation
PCC.7 (MCC) = 0
PCC.4 (CSS) = 0
CSS ← 1
MCM = 03H
Note
; X1 oscillation
; X1 input clock or Ring-OSC clock
; X1 input clock operation
; Subsystem clock operation
MCS = 1 not changed.
CLS is changed from 0 to 1.