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參數資料
型號: HM17CM256
廠商: HYNIX SEMICONDUCTOR INC
元件分類: 顯示驅動器
英文描述: 128XRGBX82 OUTPUT LCD DRIVER IC with built-in RAM
中文描述: LIQUID CRYSTAL DISPLAY DRIVER, UUC580
封裝: 19.75 X 2.39 MM, GOLD BUMP, DIE-580
文件頁數: 37/111頁
文件大小: 2094K
代理商: HM17CM256
HM17CM256
- 37 -
ACCESS WITH 8 BIT BUS EXAMPLE : GRAY MODE , ACCESS UNDER (REF, SWAP)=(0, 0)
(21) OSCILLATOR CIRCUIT
HM17CM256 has the CR oscillator. The output of oscillator is used as the timing signal source of
display and boosting clock to the booster. This is valid only in the master operation mode.
When in the master operation mode and if external clock is used, feed the clock to OSC
1
pin or
connect resistor between OSC
1
and OSC
2
.
And feedback resistance with command can set the inner oscillator circuit of HM17CM256.
The frame frequency can be altered by changed oscillator frequency according to feedback
resistance length set value. To get optimum frame frequency, please check LCD and then set the
frequency of oscillator.
(22) POWER SUPPLY CIRCUIT
Gradation
palette
j=0~7
GLSB circuit
Gradation control circuit
Latched data
SEGSA
0
SEGSB
0
Palette Aj
Palette Bj
0
0
1
0
0
SEGSC
0
Palette Cj
1
1
1
MSB LSB
MSB LSB
MSB
0
D
0
0
D
1
1
D
2
0
D
3
0
D
4
1
D
5
1
1
D
7
D
6
0
CPU access data
X address :00
H
Gradation palette
j=0~7
Gradation control circuit
SEGSA
3
SEGSB
3
Palette Aj
Palette Bj
0
0
1
0
0
SEGSC
3
Palette Cj
1
1
1
MSB LSB
MSB LSB
MSB
0
D
0
0
D
1
1
D
2
0
D
3
0
D
4
1
D
5
1
1
D
7
D
6
0
GLSB circuit
CPU access data
Latched data
X address :03
H
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