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BAT32G1x9 user manual | Chapter 4 Clock generation circuit
110 / 1149
Rev.1.02
Table 4-3 Example of CPU clock transfer and SFR register setting (3/5).
(6) The CPU is transferred from high-speed system clock operation (C) to high-speed internal oscillator clock
operation (B).
(SFR registers are set in order).
Setting flag for the
SFR register
State transition
CSC registers
Wait for the oscillation
accuracy to stabilize
CKC registers
HIOSTOP
MCM0
(C)
(B)
0
note
0
Not required during high-speed internal oscillator clock operation.
note: FRQSEL4=0
时
:
45μs
~
65
μs
FRQSEL4=1
时
:
45μs
~
135μs
Note The oscillation accuracy of the high-speed internal oscillator clock is stable
and
waits for change due to temperature
conditions and during deep sleep mode.
(7) The CPU shifts from high-speed system clock operation (C) to secondary system clock operation (D).
(SFR registers are set in order).
Setting flag for the
SFR
register
State transition
CSC registers
Wait for the oscillation
accuracy to stabilize
CKC registers
XTSTOP
CSS
(C)
(D)
0
required
1
Not required in subsystem clock operation.
(8) The CPU shifts from subsystem clock operation (D) to high-speed internal oscillator clock operation (B).
(SFR registers are set in order).
Setting flag for the
SFR
register
State transition
CSC registers
Wait for the oscillation
accuracy to stabilize
CKC registers
HIOSTOP
CSS
(D)
(B)
0
note
0
Not required during high-speed internal oscillator clock operation.
note: FRQSEL4=0
时
:
45μs
~
65μs
FRQSEL4=1
时
:
45μs
~
135μs
Note 1
A) ~ (I)
of
Table
43
~
( I)in figure 4-22.
2. The oscillation accuracy of the high-speed internal oscillator clock is stable and waiting due to temperature
conditions and
deep sleep
mode periods.