upd78f0114m6gb-8es Renesas Electronics Corporation., upd78f0114m6gb-8es Datasheet - Page 122
upd78f0114m6gb-8es
Manufacturer Part Number
upd78f0114m6gb-8es
Description
8-bit Single-chip Microcontrollers
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.UPD78F0114M6GB-8ES.pdf
(534 pages)
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5.8 Clock Switching Flowchart and Register Setting
5.8.1 Switching from Ring-OSC clock to X1 input clock
122
Ring-OSC clock
value after reset
Register initial
X1 input clock
Note Check the oscillation stabilization wait time of the X1 oscillator after reset release using the OSTC register
operation
operation
and then switch to the X1 input clock operation after the oscillation stabilization wait time has elapsed. The
OSTS register setting is valid only after STOP mode is released by interrupt during X1 input clock operation.
Figure 5-14. Switching from Ring-OSC Clock to X1 Input Clock (Flowchart)
X1 oscillation stabilization
(dividing set PCC)
clock operation
time has not elapsed
Ring-OSC
CHAPTER 5 CLOCK GENERATOR
X1 input clock operation
User’s Manual U16227EJ3V0UD
After reset release
Each processing
OSTS = 05H
OSTC check
OSTC = 00H
RCM = 00H
MCM = 00H
MOC = 00H
PCC setting
MCM.0
PCC = 00H
X1 oscillation stabilization time has elapsed
1
Note
Note
; f
; Ring-OSC oscillation
; Ring-OSC clock operation
; X1 oscillation
; Oscillation stabilization time counter status register
; Oscillation stabilization time f
CPU
; X1 oscillation stabilization time status check
MCM.1 (MCS) is changed from 0 to 1
= f
R
XP
/2
16
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