upd78f0124m6gba1-8et Renesas Electronics Corporation., upd78f0124m6gba1-8et Datasheet - Page 126

• Manufacturer Part Number: upd78f0124m6gba1-8et
• Description: 8-bit Single-chip Microcontrollers
• Manufacturer: Renesas Electronics Corporation.

5.8.2 Switching from X1 input clock to internal oscillation clock
126
Internal oscillation
Note Required only when “Can be stopped by software” is selected for the internal oscillator by a mask option.
clock operation
clock operation
X1 input
Figure 5-15. Switching from X1 Input Clock to Internal Oscillation Clock (Flowchart)
Register setting
clock operation
in X1 input
RSTOP = 0
Yes: RSTOP = 1
CHAPTER 5 CLOCK GENERATOR
User’s Manual U16315EJ3V1UD
Internal oscillation clock operation
PCC.7 (MCC) = 0
PCC.4 (CSS) = 0
(RSTOP) = 1?
MCM = 03H
MCM0 ← 0
RCM.0
No: RSTOP = 0
Note
; X1 oscillation
; X1 input clock or internal oscillation clock
; X1 input clock operation
; Internal oscillator oscillating?
; Internal oscillation clock operation
MCM.1 (MCS) is changed from 1 to 0