EM65571AGH EMC [ELAN Microelectronics Corp], EM65571AGH Datasheet - Page 47

• Manufacturer Part Number: EM65571AGH
• Description: 130COM / 128SEG 65K Color STN LCD Driver
• Manufacturer: EMC [ELAN Microelectronics Corp]

Product Specification (V1.0) 08.04.2005
(This specification is subject to change without further notice)
MPU Write Data
X address: nH
Gradation palette
Gradation control
display RAM data
7.13
MSB
D0
1
0
Gradation LSB Control
In 256 color mode (C256=1), the EM65571 provides segment driver output for
8-gradation display using 3 bits and for 4-gradation display using 2 bits.
The segment driver output for the 4-gradation display uses 2 bits written to the
corresponding RAM area and 1 bit supplemented by the gradation LSB circuit, and
then selects 4-gradation from 8-gradation.
In 256 color mode (C256=1), the segment driver output for the 4-gradation display
results in a gradation level of 0 regardless of the gradation LSB when 2 bits of data on
the display RAM are “00”. When 2-bits of data on the display RAM are “11”, a gradation
level of 7/7 is selected regardless of the bit information of the gradation LSB. The other
gradation levels are selected depending on the 2 bits of data on the display RAM and
the gradation LSB bits.
One bit of data is supplemented by setting the gradation LSB register (GLSB).
The Gradation LSB control bit is applied to all 4-gradation segment drivers.
Gradation LSB = “0”: Select 0 as the LSB information on the RAM for 4-gradation
segment drivers.
Gradation LSB = “1”: Select 1 as the LSB information on the RAM for 4-gradation
segment drivers.
Palette Cj
SEGAi
Note : Internal X address : nH
D1
1
0
LSB
D2
1
1
(REF, SWAP)=(0,1) or (1,0)
MSB
D3
0
0
Palette Bj
SEGBi
D4
0
0
LSB
D5
: 3FH-nH
1
1
MSB
Palette Aj
D6
SEGCi
0
1
(REF="0")
- - - - - - - -
- - - - - - - -
(REF="1")
D7
0
1
MSB
D8
1
0
SEGAi+1
130COM/128SEG 65K Color STN LCD Driver
Palette Cj
D9
1
0
D10 D11 D12 D13 D14 D15
LSB
1
1
MSB
0
0
SEGBi+1
Palette Bj
0
0
LSB
1
1
SEGCi+1
MSB
Palette Aj
0
1
0
1
i=0, 2, 4 to 126
EM65571
LSB circuit
Gradation
j = 0 to 7
0
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