HM17CM256 HYNIX [Hynix Semiconductor], HM17CM256 Datasheet - Page 69

• Manufacturer Part Number: HM17CM256
• Description: 128XRGBX82 OUTPUT LCD DRIVER IC with built-in RAM
• Manufacturer: HYNIX [Hynix Semiconductor]

(34-17) Serial extension CS control
(34-18) display selection control
(34-16) Display start command set
a) GLSB command
b) PWM command
( reset :{SC
( reset :{EXCS}=1
( reset :{PWM, GLSB}=0
CS
CS
CS
0
0
0
gradation levels out of 8 gradation levels, 2 bit data out of RAM area and 1 bit out of Gradation LBS.
EXCS pin is I/O pin and used as output at master mode device thus can be controlled.
Setting the scan start output of common driver.
SHIFT=0:COM increasing direction scanning
SHIFT=1:COM decreasing direction scanning
Controlling the output of extension CS at serial interface application.
EXCS=”0”:EXCS pin output is set to “L”.
EXCS=”1”:EXCS pin output is set to “H”.
The segment driver outputs corresponding to 4 gradation display actually uses 3 bit data to select 4
This command sets the supplement 1 bit Gradation LSB ( GLSB ) register.
GLSB=”0”: Set the LSB of segment driver corresponding to 4-gradataion display to “0”.
GLSB=”1”: Set the LSB of segment driver corresponding to 4 gradataion display to “1”.
Selection gradation display mode.
PWM=”0”: Gradation mode is selected variable 8 gradation among 32 levels.
PWM=”1”: Fixed 8 gradation display mode.
RS
RS
RS
SC
1
1
1
0
0
0
0
1
1
1
1
2
2
, SC
RD
RD
RD
SC
1
1
1
0
0
1
1
0
0
1
1
1
, SC
H
1
, read address :7
WR
WR
WR
0
0
0
0
SC
}=0
0
1
0
1
0
1
0
1
H
, read address :8
0
H
, read address :6
RE
RE
RE
1
1
1
SHIFT=0 starting point of COM.
2
2
2
RE
RE
RE
0
0
0
H
1
1
1
) * : “Don’t care”
RE
RE
RE
forbidden
forbidden
COM
COM
COM
COM
COM
COM
0
0
0
H
H
0
0
0
) * : “Don’t care”
) * : “Don’t care”
15
30
45
60
75
0
~
~
~
~
~
~
D
D
D
0
0
1
7
7
7
D
D
D
1
1
0
6
6
6
SHIFT=1 starting point of COM.
D
D
D
1
1
0
5
5
5
D
D
D
0
1
0
4
4
4
forbidden
forbidden
COM
COM
COM
COM
COM
COM
PWM GLSB
D
D
D
*
*
3
3
3
79
64
49
34
19
4
HM17CM256
~
~
~
~
~
~
SC
D
D
D
*
2
2
2
2
SC
D
D
D
*
*
1
1
1
1
EXCS
SC
D
D
D
*
0
0
0
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