upd78f0103hmca1-5a4-a Renesas Electronics Corporation., upd78f0103hmca1-5a4-a Datasheet - Page 101

• Manufacturer Part Number: upd78f0103hmca1-5a4-a
• Description: 8-bit Single-chip Microcontrollers
• Manufacturer: Renesas Electronics Corporation.

5.8.2 Switching from high-speed system clock to internal oscillation clock
High-speed system
Note Required only when “can be stopped by software” is selected for the internal oscillator by the option byte.
Internal oscillation
clock operation
clock 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
User’s Manual U16846EJ3V0UD
Internal oscillation clock operation
(RSTOP) = 1?
MCM = 03H
MCM.0 ← 0
RCM.0
No: RSTOP = 0
Note
; High-speed system clock operation
; Internal oscillator oscillating?
; Internal oscillator oscillating
MCM.1 (MCS) is changed from 1 to 0
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