425
LCR—LCD control register
H'C1
LCD controller/driver
Bit
Initial value
Read/Write
7
—
1
—
6
PSW
0
R/W
5
ACT
0
R/W
3
CKS3
0
R/W
0
CKS0
0
R/W
2
CKS2
0
R/W
1
CKS1
0
R/W
4
DISP
0
R/W
LCD drive power supply on/off control
Frame frequency select
Operating Clock
Bit 1
Bit 2
Bit 3
0
0
0
1
1
1
1
1
1
1
1
*
*
*
0
0
0
0
1
1
1
1
0
0
1
0
0
1
1
0
0
1
1
0
1
*
0
1
0
1
0
1
0
1
Bit 1
CKS1
CKS2
CKS3
CKS0
øw
øw
øw/2
ø/2
ø/4
ø/8
ø/16
ø/32
ø/64
ø/128
ø/256
Display function activate
LCD controller/driver operation halted
LCD controller/driver operates
: Don’t care
*
0
1
0
LCD drive power supply off
1
LCD drive power supply on
Display data control
0
Blank data is displayed
1
LCD RAM data is displayed