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BAT32G1x9 user manual | Chapter 4 Clock generation circuit
103 / 1149
Rev.1.02
4.6 Clock control
4.6.1
Example of setting up a high-speed internal oscillator
After the reset is released, the CPU/Peripheral Hardware Clock (f
CLK
) must be running at a high-speed internal oscillator clock. It
can pass the FRQSEL0~FRQSEL4 bits of the option byte (000C2H) from 64MHz, 48MHz, and 32MHz , 24MHz, 16MHz, 12MHz,
8MHz, 6MHz, 4MHz , 3MHz, 2MHz, and 1MHz to select the frequency of the high-speed internal oscillator. In addition, the
frequency can be changed by the frequency selection register (HOCODIV) of the high-speed internal oscillator.
【
Setting of option bytes
】
Address: 000C2H
Options
7
6
5
4
3
2
1
0
byte
(000C2H)
FRQSEL4
FRQSEL3
FRQSEL2
FRQSEL1
FRQSEL0
Frequency of a high-speed
internal oscillator
f
HOCO
f
IH
1
1
0
0
0
64MHz
64MHz
1
0
0
0
0
48MHz
48MHz
0
1
0
0
0
32MHz
32MHz
0
0
0
0
0
24MHz
24MHz
0
1
0
0
1
32MHz
16MHz
0
0
0
0
1
24MHz
12MHz
0
1
0
1
0
32MHz
8MHz
0
0
0
1
0
24MHz
6MHz
0
1
0
1
1
32MHz
4MHz
0
0
0
1
1
24MHz
3MHz
0
1
1
0
0
32MHz
2MHz
0
1
1
0
1
32MHz
1MHz
Other than the above
Prohibit settings.
1
1
1
FRQSEL4
0/1
FRQSANDL3
0/1
FRQSEL2
0/1
FRQSEL1
0/1
FRQSEL0
0/1