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GS9092A Datasheet(PDF) 24 Page - Semtech Corporation |
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GS9092A Datasheet(HTML) 24 Page - Semtech Corporation |
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24 / 61 page  GS9092A GenLINX® III 270Mb/s Serializer for SDI and DVB-ASI Final Data Sheet 34715 - 5 February 2013 24 of 61 3.2.1 Parallel Input in SMPTE Mode When the device is operating in SMPTE mode (see SMPTE Mode on page 34), SD data is presented to the input bus in 10-bit multiplexed format. The input data format must be word aligned, multiplexed luma and chroma data. Note: When operating the device in an 8-bit SMPTE system, the 2 LSBs (DIN [1:0]) must be set to 0. 3.2.2 Parallel Input in DVB-ASI Mode When operating in DVB-ASI mode (see DVB-ASI Mode on page 35), the device will accept 8-bit data words on DIN[7:0] such that DIN7 = HIN is the most significant bit of the encoded transport stream data and DIN0 = AIN is the least significant bit. In addition, DIN9 and DIN8 will be configured as the DVB-ASI control signals INSSYNCIN and K_IN respectively. See Control Signal Inputs on page 35 for a description of these DVB-ASI specific input signals. 3.2.3 Parallel Input in Data-Through Mode When operating in Data-Through mode (see Data-Through Mode on page 36), the GS9092A passes data presented to the parallel input bus to the serial output without performing any encoding, scrambling, or word-alignment. 3.2.4 I/O Buffers The parallel data bus, status signal outputs, and control signal input pins are all connected to high-impedance buffers. These buffers use either +1.8V or +3.3V DC, supplied at the IO_VDD and IO_GND pins. For a +3.3V tolerant I/O, the IO_VDD pins can be connected to either +1.8V or +3.3V. For a +5V tolerant I/O, the IO_VDD pins must be supplied with +3.3V. While RESET is LOW, STAT output pins are muted and all other output pins become high impedance. 3.3 Internal FIFO Operation The GS9092A contains an internal video line-based FIFO, which can be programmed by the application layer to work in any of the following modes: 1. Video Mode Table 3-1: Input Data Format Selection Pin Settings Input Data Format DIN[9:0] SMPTE_BYPASS DVB_ASI 10-bit Data DATA LOW LOW 10-bit Multiplexed SDLuma/Chroma HIGHLOW 10-bit DVB-ASIDVB-ASI data X HIGH |
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