upd78f0124hgba1-8et-a Renesas Electronics Corporation., upd78f0124hgba1-8et-a Datasheet - Page 118

• Manufacturer Part Number: upd78f0124hgba1-8et-a
• Description: 8-bit Single-chip Microcontrollers
• Manufacturer: Renesas Electronics Corporation.

5.8.2 Switching from high-speed system clock to internal oscillation clock
118
Internal oscillation
clock operation
system clock
High-speed
Note Required only when “can be stopped by software” is selected for internal oscillator by the option byte.
operation
Figure 5-15. Switching from High-Speed System Clock to internal oscillation Clock (Flowchart)
in high-speed system
Register setting
clock operation
RSTOP = 0
Yes: RSTOP = 1
CHAPTER 5 CLOCK GENERATOR
Internal oscillation clock operation
User’s Manual U16962EJ3V0UD
PCC.7 (MCC) = 0
PCC.4 (CSS) = 0
(RSTOP) = 1?
MCM = 03H
MCM.0 ← 0
RCM.0
No: RSTOP = 0
Note
; High-speed system clock oscillation
; High-speed system clock or Internal oscillation clock
; High-speed system clock operation
; Internal oscillator oscillating?
; Internal oscillation clock oscillating
MCM.1 (MCS) is changed from 1 to 0