參數(shù)資料
型號(hào): EP7211
廠商: Cirrus Logic, Inc.
英文描述: HIGH-PERFORMANCE ULTRA-LOW-POWER SYSTEM-ON-CHIP WITH LCD CONTROLLER
中文描述: 高性能超低功耗系統(tǒng)與LCD控制器芯片
文件頁(yè)數(shù): 109/166頁(yè)
文件大?。?/td> 2623K
代理商: EP7211
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EP7211
High-Performance Ultra-Low-Power System-on-Chip with LCD Controller
109
Register Descriptions
DS352PP3
JUL 2001
5.10.2 PALLSW Least Significant Word
LCD Palette Register
ADDRESS: 0x8000.0580
.
The least and most significant word LCD palette registers make up a 64-bit read/write register which
maps the logical pixel value to a physical grey scale level. The 64-bit register is made up of 16 x 4-
bit nibbles, each nibble defines the grey scale level associated with the appropriate pixel value. If the
LCD controller is operating in two bits per pixel, only the lower 4 nibbles are valid (D15
D0 in the
least significant word).
5.10.3 PALMSW Most Significant Word
LCD Palette Register
ADDRESS: 0x8000.0540
See PALLSW description.
The actual physical color and pixel duty ratio for the grey scale values are shown in the table above.
Note that colors 8
15 are the inverse of colors 7
0 respectively. This means that colors 7 and 8 are
identical. The steps in the grey scale are non-linear, but have been chosen to give a close
approximation to perceived linear grey scales. The is due to the eye being more sensitive to changes
in grey level close to 50% grey.
31
28
27
24
23
20
19
16
15
12
11
8
7
4
3
0
Grey scale
value for pixel
value 7
Grey scale
value for
pixel value 6
Grey scale
value for
pixel value 5
Grey scale
value for
pixel value 4
Grey scale
value for
pixel value 3
Grey scale
value for
pixel value 2
Grey scale
value for
pixel value 1
Grey scale
value for
pixel value 0
31
28
27
24
23
20
19
16
15
12
11
8
7
4
3
0
Grey scale
value for pixel
value 15
Grey scale
value for
pixel value
14
Grey scale
value for
pixel value
13
Grey scale
value for
pixel value
12
Grey scale
value for
pixel value
11
Grey scale
value for
pixel value
10
Grey scale
value for
pixel value 9
Grey scale
value for
pixel value 8
Table 5-12. Grey Scale Value to Color Mapping
Grey Scale Value
Duty Cycle
% Pixels Lit
% Step Change
0
0
0%
11.1 %
1
1/9
11.1 %
8.9 %
2
1/5
20.0 %
6.7 %
3
4/15
26.7 %
6.6 %
4
3/9
33.3 %
6.7 %
5
2/5
40.0 %
5.4 %
6
4/9
44.4 %
5.6 %
7
1/2
50.0 %
0.0 %
相關(guān)PDF資料
PDF描述
EP7211-CP-A HIGH-PERFORMANCE ULTRA-LOW-POWER SYSTEM-ON-CHIP WITH LCD CONTROLLER
EP7211-CV-A HIGH-PERFORMANCE ULTRA-LOW-POWER SYSTEM-ON-CHIP WITH LCD CONTROLLER
EP7212 HIGH-PERFORMANCE, LOW-POWER SYSTEM-ON-CHIP WITH LCD CONTROLLER AND DIGITAL AUDIO INTERFACE(DAI)
EP7212-CB-A HIGH-PERFORMANCE, LOW-POWER SYSTEM-ON-CHIP WITH LCD CONTROLLER AND DIGITAL AUDIO INTERFACE(DAI)
EP7212-CV-A HIGH-PERFORMANCE, LOW-POWER SYSTEM-ON-CHIP WITH LCD CONTROLLER AND DIGITAL AUDIO INTERFACE(DAI)
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