ML51/ML54/ML56
Sep. 01, 2020
Page
133
of 719
Rev 2.00
ML
51
/ML
54
/ML
5
6 S
E
RI
E
S
TECHNI
CA
L
RE
F
E
R
E
NC
E
M
A
NU
A
L
ML51/M
L54
/M
L56
Series
Tec
hnical Reference
Manual
CKCON
– Clock Control
Register
SFR Address
Reset Value
CKCON
8EH, Page 0
1000_0000b
7
6
5
4
3
2
1
0
FASTWK
PWMCKS
T1OE
T1M
T0M
T0OE
CLOEN
-
R/W
R/W
R/W
R/W
R/W
R/W
R/W
-
Bit
Name
Description
[7]
FASTWK
Fast Wakeup Enable
0 = Faster Wakeup Disabled, when system wakeup from Power-down mode, HIRC clock
stable time is about 10us.
1 = Faster Wakeup Enabled, when system wakeup from Power-down mode, HIRC clock stable
time is about 3us.
[6]
PWMCKS
PWM Clock Source Select
0 = The clock source of PWM is the system clock FSYS.
1 = The clock source of PWM is the overflow of Timer 1.
[5]
T1OE
Timer 1 Output Enable
0 = Timer 1 output Disabled.
1 = Timer 1 output Enabled from T1 pin.
Note that Timer 1 output should be enabled only when
operating in its “Timer” mode.
[4]
T1M
Timer 1 Clock Mode Select
0 = The clock source of Timer 1 is the system clock divided by 12. It maintains standard 8051
compatibility.
1 = The clock source of Timer 1 is direct the system clock.
[3]
T0M
Timer 0 Clock Mode Select
0 = The clock source of Timer 0 is the system clock divided by 12. It maintains standard 8051
compatibility.
1 = The clock source of Timer 0 is direct the system clock.
[2]
T0OE
Timer 0 Output Enable
0 = Timer 0 output Disabled.
1 = Timer 0 output Enabled from T0 pin.
Note that Timer 0 output should be enabled only when operating in its “Timer” mode.
[1]
CLOEN
System Clock Output Enable
0 = System clock output Disabled.
1 = System clock output Enabled from CLO pin.
Once system clock output was enabled, only POR/BOD reset can disable it.
[0]
-
Reserved.