BAT32G1x9 user manual | Chapter 4 Clock generation circuit
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Rev.1.02
Table 4-4
on the transfer of CPU clocks (2/2).
CPU clock
Conditions before transfer
Treatment after
transfer
Before
transfer
After
transfer
XT1 clock
High-speed
internal
oscillator
The high-speed internal oscillator is oscillating
and selects high-speed internal
Can stop the oscillation of
XT1
(XTSTOP=1).
clock
The oscillator clock acts as the main system clock.
• HIOSTOP=0
,
MCS=0
X1 clock
The X1 oscillates stably and selects the high-
speed system clock as the main system
Unified clock.
• OSCSEL=1
,
EXCLK=0
,
MSTOP=0
• After a stable time of oscillation
• MCS=1
External master
system clock
Set the external clock of the EXCLK
pin input to be
active and select the high-speed system clock as the
main system clock.
• OSCSEL=1
,
EXCLK=1
,
MSTOP=0
• MCS=1
External
subsystem clock
Cannot be transferred.
—
External
subsystem clock
High-speed
internal
oscillator
The high-speed internal oscillator is oscillating
and selects high-speed internal
The input of the external
subsystem clock can be
invalidated
clock
The oscillator clock acts as the main system clock.
(XTSTOP=1)
。
• HIOSTOP=0
,
MCS=0
X1 clock
The X1 oscillates stably and selects the high-
speed system clock as the main system
Unified clock.
• OSCSEL=1
,
EXCLK=0
,
MSTOP=0
• After a stable time of oscillation
• MCS=1
External master
system clock
Set the external clock of the EXCLK
pin input to be
active and select the high-speed system clock as the
main system clock.
• OSCSEL=1
,
EXCLK=1
,
MSTOP=0
• MCS=1
XT1 clock
Cannot be transferred.
—