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Bits 3 to 0—Frame Frequency Select 3 to 0 (CKS3 to CKS0): Bits 3 to 0 select the operating
clock and the frame frequency. In subactive mode, watch mode, and subsleep mode, the system
clock (ø) is halted, and therefore display operations are not performed if one of the clocks from ø/8
to ø/1024 is selected. If LCD display is required in these modes, ø
selected as the operating clock.
Bit 3:
Bit 2:
Bit 1:
CKS3
CKS2
CKS1
0
0
*
1
1
0
0
1
1
0
1
Notes: *1 When 1/3 duty is selected, the frame frequency is 4/3 times the value shown.
*2 This is the frame frequency when ø
638
Bit 0:
CKS0
Operating Clock
0
ø
SUB
1
ø
/2
SUB
ø
/4
*
SUB
0
ø/8
1
ø/16
0
ø/32
1
ø/64
0
ø/128
1
ø/256
0
ø/512
1
ø/1024
= 32.768 kHz.
SUB
, ø
/2, or ø
/4 must be
SUB
SUB
SUB
*1
Frame Frequency
ø = 20 MHz
*2
128 Hz
(Initial value)
*2
64 Hz
*2
32 Hz
4880 Hz
2440 Hz
1220 Hz
610 Hz
305 Hz
152.6 Hz
76.3 Hz
38.1 Hz
*: Don't care
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