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LCR—LCD Control Register
Bit
7
—
Initial value
1
Read/Write
—
Display Function Activate
0
1
LCD Power Supply Split-Resistance Connection Control
0
LCD power supply split-resistance is disconnected from V
1
LCD power supply split-resistance is connected to V
6
5
PSW
ACT
0
0
R/W
R/W
Frame Frequency Select
Bit 3
Bit 2
CKS3
CKS2
0
*
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
Display Data Control
0
Blank data is displayed
1
LCD RAM data is display
LCD controller/driver operation halted
LCD controller/driver operates
H'FC31
4
3
DISP
CKS3
0
0
R/W
R/W
Bit 1
Bit 0
Operating Clock
CKS1
CKS0
ø
0
0
SUB
ø
1
SUB
ø
1
*
SUB
ø/8
0
0
ø/16
1
ø/32
1
0
ø/64
1
ø/128
0
0
ø/256
1
ø/512
1
0
ø/1024
1
CC
2
1
CKS2
CKS1
CKS0
0
0
R/W
R/W
Frame Frequency
ø = 20 MHz
128 Hz
*2
/2
64 Hz
*2
/4
32 Hz
4880 Hz
2440 Hz
1220 Hz
610 Hz
305 Hz
152.6 Hz
76.3 Hz
38.1 Hz
*: Don't care
= 32.768 kHz.
SUB
CC
LCD
0
0
R/W
*1
*2
957
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