參數(shù)資料
型號: AL128
廠商: Electronic Theatre Controls, Inc.
元件分類: 圓形連接器
英文描述: Circular Connector; No. of Contacts:55; Series:MS27497; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:22; Circular Contact Gender:Socket; Circular Shell Style:Wall Mount Receptacle RoHS Compliant: No
中文描述: 即插即用VGA到的NTSC / PAL制式轉(zhuǎn)換器
文件頁數(shù): 14/45頁
文件大?。?/td> 498K
代理商: AL128
AL128
April 2, 1999
14
6.1.3 Feature Connector
The definition of the data bits of the feature connector is same as that of the VAFC, i.e.,
D15~D11 represent red signals. D10~D5 green signals, and D4~D0 blue signals. However, since
the feature connector uses 8-bit interface, the two bytes of data must be received within one
pixel/graphic clock (GCLK). The solution is: one byte at the rising edge and one byte at the
falling edge of GCLK as follows:
The eight-bit data is wired to BLUE<7:0> of the AL128 as follows:
6.1.4 Sampling (Pixel) Clock
The sampling clock for the RGB data can come directly from the graphic pixel clock when this is
available. For external box applications where the graphic pixel clock is not available, the clock
is recovered from the VGA horizontal sync with an external PLL clock chip such as ICS
AV9173. The phase reference signal of the PLL clock chip is generated by the divide-by-M
circuitry of the AL128. The AL128 automatically sets the M divider value, which determines the
sampling frequency for the A/D converter according to the detected resolution of the incoming
graphic data.
GCLK
DATA
D7~D0
D15~D8
D7~D0
D7~D0
D15~D8
D15
D14
D13
D12
D11
D10
D9
D8
BLUE 7
BLUE 6
BLUE 5
BLUE 4
BLUE 3
BLUE 2
BLUE 1
BLUE 0
D7
D6
D5
D4
D3
D2
D1
D0
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