bt829bkrf ETC-unknow, bt829bkrf Datasheet - Page 55

• Manufacturer Part Number: bt829bkrf
• Description: Video Streamii Decoders
• Manufacturer: ETC-unknow

2.1.1 Analog Signal Selection
2.1.2 Multiplexer Considerations
2.0 Electrical Interfaces
2.1 Input Interface
The Bt829B/827B contains an on-chip 4:1 MUX. For the Bt829B and Bt827B,
this multiplexer can be used to switch between four composite sources or three
composite sources and one S-Video source. In the first configuration, connect the
inputs of the multiplexer (MUX[0], MUX[1], MUX[2], and MUX[3]) to the four
composite sources. In the second configuration, connect three inputs to the com-
posite sources and the other input to the luma component of the S-Video connec-
tor. In both configurations the output of the multiplexer (MUXOUT) should be
connected to the input to the luma A/D (YIN) and the input to the sync detection
circuitry (SYNCDET) through a optional 0.1 F capacitor (to maintain compati-
bility with the Bt829/827). When implementing S-Video, the input to the chroma
A/D (CIN) should be connected to the chroma signal of the S-Video connector.
only one video source is required, the source may be connected directly to YIN.
The multiplexer is not a break-before-make design. Therefore, during the multi-
plexer switching time it is possible for the input video signals to be momentarily
connected together through the equivalent of 200 .
Use of the multiplexer is not a requirement for operation. If digitization of
The multiplexers cannot be switched on a real-time pixel-by-pixel basis.
D829BDSA
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