EM65571 ELAN Microelectronics Corp, EM65571 Datasheet - Page 41
EM65571
Manufacturer Part Number
EM65571
Description
130com / 128seg 65k Color Stn Lcd Driver
Manufacturer
ELAN Microelectronics Corp
Datasheet
1.EM65571.pdf
(118 pages)
- Current page: 41 of 118
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Product Specification (V1.0) 08.04.2005
(This specification is subject to change without further notice)
7.12 Display Data Structure and Gradation Control
For the purpose of gradation control, one pixel requires multiple bits of display RAM.
The EM65571 has 5-bit of data per output to achieve the gradation display.
The three outputs of the segment driver are used for one pixel of RGB, and the
EM65571 is connected to an STN color LCD panel. It can display 128*128 pixels with
65K colors (5 bits * 6 bits [5+FRC] * 5 bits). In this case, since the gradation display
data is processed by a single access to the memory, the data can be rewritten fast and
naturally.
The weighting for each data bit is dependent on the status of the SWAP bit and the REF
bit that is selected when data is written to the display RAM.
LSB
D0 D1 D2 D3 D4 D5 D6 D7 D0 D1 D2 D3 D4 D5 D6 D7
1
1
Gradation Mode (65K Color)
8-bit Mode
Palette Aj
0
0
SEGAi
1
1
(REF, SWAP) = (0, 0) or (1, 1)
0
0
MSB LSB
1
1
0
0
Note: Internal X-address
0
0
Palette Bj
1
1
SEGBi
0
0
0
0
130COM/128SEG 65K Color STN LCD Driver
MSB
1
1
LSB
0
0
0
Palette Cj
0
SEGCi
1
1
0
0
MSB
0
0
Gradation Palette
Gradation Control
Display RAM Data
MPU Write Data
X Address: 2nH, 2n+1H
i = 0 to 127
j = 0 to 47
EM65571
x 35
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