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ML51/ML54/ML56
Sep. 01, 2020
Page
299
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Rev 2.00
ML
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/ML
5
6 S
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TECHNI
CA
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F
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R
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NC
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M
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ML51/M
L54
/M
L56
Series
Tec
hnical Reference
Manual
CKDIV
– Clock Divider
Register
SFR Address
Reset Value
CKDIV
C1H, Page 1
0000_0000b
7
6
5
4
3
2
1
0
CKDIV[7:0]
R/W
Bit
Name
Description
[7:0]
CKDIV[7:0]
Clock Divider
The system clock frequency FSYS follows the equation below according to CKDIV value.
OSC
SYS
F
=
F
, while CKDIV = 00H, and
CKDIV
×
2
F
=
F
OSC
SYS
, while CKDIV = 01H to FFH.
System Clock Output
6.2.1.6
The ML51/ML54/ML56 Series provides a CLO pin that outputs the system clock. Its frequency is the
same as F
SYS
. The output enable bit is CLOEN (CKCON.1). CLO output stops when device is put in its
Power-down mode because the system clock is turned off. Note that when noise problem or power
consumption is important issue, user had better not enable CLO output.