upd78f0148m1gka1-9eu Renesas Electronics Corporation., upd78f0148m1gka1-9eu Datasheet - Page 155
upd78f0148m1gka1-9eu
Manufacturer Part Number
upd78f0148m1gka1-9eu
Description
8-bit Single-chip Microcontrollers
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.UPD78F0148M1GKA1-9EU.pdf
(668 pages)
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6.8.4
clock operation
clock operation
Subsystem
X1 input
Switching from subsystem clock to X1 input clock
Figure 6-17. Switching from Subsystem Clock to X1 Input Clock (Flowchart)
No: X1 oscillating
X1 oscillation
stabilization time
not elapsed
CHAPTER 6 CLOCK GENERATOR
User’s Manual U15947EJ3V1UD
X1 input clock operation
PCC.4 (CSS) = 1
OSTC check
MCM = 03H
MCC = 1?
MCC ← 0
CSS ← 0
X1 oscillation stabilization time elapsed
Yes: X1 oscillation stopped
; Subsystem clock operation
CLS is changed from 1 to 0.
MCS = 1 not changed.
; X1 oscillating?
; X1 oscillation enabled
; Wait for X1 oscillation stabilization time
; X1 input clock operation
155
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