參數(shù)資料
型號(hào): 82C205
英文描述: Consumer IC
中文描述: 消費(fèi)性IC
文件頁(yè)數(shù): 32/47頁(yè)
文件大?。?/td> 460K
代理商: 82C205
Advance Information
82C205
912-1000-024
Page 28
Revision 1.0
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Video Input Source Selection (R/W)
Default = 00h
Reserved
Reserved
Reserved
Overlay grid
dots on input
pattern:
0: disable
(default)
1: enable
Video Input Source Select. Video sources can be from the A/D
converters or a test pattern generator:
0000: Reserved
0001: Black color pattern
0010: White color pattern
0011: Grey color pattern
0100: Red color pattern
0101: Green color pattern
0110: Blue color pattern
0111: Horizontal ramp pattern
1000: Horizontal line pattern
1001: Vertical ramp pattern
1010: Vertical line pattern
1011: Alternating block scan patterns
1100: B/W checker board pattern
1101: G&P checker board pattern
1110: Color bar pattern
1111: 4 corner blend pattern
5.10. Resolution Detection Registers
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Index 70h
Resolution Counter (R)
Default = 00h
Counter for number of VGA horizontal syncs in a frame (in units of capture video lines).
Low Byte
Index 71h
Resolution Counter (R)
Default = 00h
High Byte
Index 72h
Horizontal Frequency Counter (R)
Default = 00h
Counter for period of VGA horizontal sync (in units of reference clock).
Reference clock frequency is 14.318 MHz
Low Byte
Index 73h
Horizontal Frequency Counter (R)
Default = 00h
High Byte
Index 74h
Active Video Top Edge (R)
Default = 00h
The line number of the first line which contains active VGA data after Vertical Sync.
Low Byte
Index 75h
Active Video Top Edge (R)
Default = 00h
Reserved
Reserved
Reserved
Reserved
High Byte
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