hd66100 Renesas Electronics Corporation., hd66100 Datasheet - Page 349
hd66100
Manufacturer Part Number
hd66100
Description
H8/3867 Series
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.HD66100.pdf
(495 pages)
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13.2.2
LCR is an 8-bit read/write register which performs LCD drive power supply on/off control and
display data control, and selects the frame frequency.
LCR is initialized to H'80 upon reset.
Bit 7: Reserved bit
Bit 7 is reserved; it is always read as 1 and cannot be modified.
Bit 6: LCD drive power supply on/off control (PSW)
Bit 6 can be used to turn the LCD drive power supply off when LCD display is not required in a
power-down mode, or when an external power supply is used. When the ACT bit is cleared to 0,
or in standby mode, the LCD drive power supply is turned off regardless of the setting of this bit.
Bit 6
PSW
0
1
Bit 5: Display function activate (ACT)
Bit 5 specifies whether or not the LCD controller/driver is used. Clearing this bit to 0 halts
operation of the LCD controller/driver. The LCD drive power supply is also turned off, regardless
of the setting of the PSW bit. However, register contents are retained.
Bit 5
ACT
0
1
334
Bit
Initial value
Read/Write
LCD Control Register (LCR)
Description
LCD drive power supply off
LCD drive power supply on
Description
LCD controller/driver operation halted
LCD controller/driver operates
—
—
7
1
PSW
R/W
6
0
ACT
R/W
5
0
DISP
R/W
4
0
CKS3
R/W
3
0
CKS2
R/W
2
0
CKS1
R/W
1
0
(initial value)
(initial value)
CKS0
R/W
0
0
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