HM17CM256 HYNIX [Hynix Semiconductor], HM17CM256 Datasheet - Page 31

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

notice) internal access X address :n
notice) internal access X address :n
The MSBs of display RAM data ( 3 bit, 2 bit ) is used as display data at black and white mode.
DISPLAY RAM BITMAP AT BLACK & WHITE MODE (MON=”1”)
ACCESS when (REF, SWAP)=(0, 0) or (1, 1)
ACCESS when (REF, SWAP)=(0, 1) or (1, 0)
GLSB circuit
Gradation control circuit
example) 8 bit width access ( the same method as 16 bit width access)
Display RAM data
CPU access data
X address :n
Gradation palette
j=0~7
0
Palette Aj
D
0
0
SEGAi
0
H
MSB
D
0
0
Aj
1
MSB
D
LSB
1
0
D
:7Fn
0
:7Fn
1
1
Palette Aj
2
H
H
Palette Bj
SEGAi
SEGBi
H
H
D
~n
~n
1
0
D
1
0
0
H
H
3
(access when REF=”0”)
(access when REF=”1”)
(access when REF=”0”)
(access when REF=”1”)
LSB MSB
D
MSB
1
1
D
2
0
0
4
D
LSB
0
0
D
3
1
1
Palette Bj
5
Palette Cj
SEGBi
SEGCi
D
0
0
D
4
1
1
6
LSB MSB
D
MSB
1
1
D
5
1
1
7
Palette Cj
D
0
1
i=0~127
Gradation palette
j=0~7
Gradation control circuit.
Display RAM data
CPU access data
X address :n
SEGCi
6
D
0
1
7
HM17CM256
GLSB circuit
i=0~127
H
0
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