BAT32G1x9 user manual | Chapter 4 Clock generation circuit
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Rev.1.02
Figure 4-7
The format of the state register (OSTC) of the oscillation settling time
counter
Address: 40020402H
after reset:
00H
R
SYMBOL
7
6
5
4
3
2
1
0
OSTC
MOS
T8
MOST
9
MOST
10
MOST
11
MOST
13
MOST
15
MOST
17
MOST
18
Oscillation steady time state
f
X
=10MHz
f
X
=20MHz
0
0
0
0
0
0
0
0
Less than
2
8
/f
X
Less than
25.6us
Less than
12.8us
1
0
0
0
0
0
0
0
At least 2
8
/f
X
At least
25.6us
At least
12.8us
1
1
0
0
0
0
0
0
At least 2
9
/f
X
At least
51.2us
At least
25.6us
1
1
1
0
0
0
0
0
At least 2
10
/f
X
At least
102us
At least
51.2us
1
1
1
1
0
0
0
0
At least 2
11
/f
X
At least
204us
At least
102us
1
1
1
1
1
0
0
0
At least 2
13
/f
X
At least
819us
At least
409us
1
1
1
1
1
1
0
0
At least 2
15
/f
X
At least
3.27ms
At least
1.63ms
1
1
1
1
1
1
1
0
At least 2
17
/f
X
At least
13.1ms
At least
6.55ms
1
1
1
1
1
1
1
1
At least 2
18
/f
X
At least
26.2ms
At least
13.1ms
Note 1 After the above time, the bits will change to "1" in turn starting from bit MOST8 and remain in the state of "1".
2. The Oscillation Settling Time Counter only counts within the Oscillation Settling Time Select Register (OSTS) set by
the Oscillation Settling Time Register (OSTS). In the following cases, the setting value of the oscillation settling time of
the OSTS register must be greater than the count value confirmed by the OSTC register.
• When the CPU clock is a high-speed internal oscillator clock or a subsystem clock and you want to start oscillation
of the X1 clock
• When the CPU clock is a high-speed internal oscillator clock and the deep sleep mode is exited after the X1 clock
oscillates to deep sleep mode
(It must therefore be noted that the OSTC register after deactivating the deep sleep mode only sets the state within
the oscillation stabilization time set by the OSTS register.)
3. The oscillation settling time of the X1 clock does not include the time before the clock begins to oscillate (Figure a
below).
Deep sleep mode is exited
X1 pin
Voltage waveform
a
Note f
X
:
X1
clock oscillation frequency
MOST8
MOST9
MOST10
MOST11
MOST13
MOST15
MOST17
MOST18