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GS2970A Datasheet(PDF) 39 Page - Semtech Corporation |
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GS2970A Datasheet(HTML) 39 Page - Semtech Corporation |
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39 / 150 page  GS2970A 3Gb/s, HD, SD SDI Receiver Data Sheet 54244 - 2 September 2012 39 of 150 4.9.2 Parallel Output in SMPTE Mode When the device is operating in SMPTE mode (SMPTE_BYPASS = HIGH and DVB_ASI = LOW), data is output in either Multiplexed or Demultiplexed form depending on the setting of the 20bit/10bit pin. When operating in 20-bit mode (20bit/10bit = HIGH), the output data is demultiplexed Luma and Chroma data for SD and HD data rates, and Data Stream 1 and Data Stream 2 for the 3G data. When operating in 10-bit mode (20bit/10bit = LOW), the output data is multiplexed Luma and Chroma data for SD and HD data rates, and multiplexed Data Stream 1 and Data Stream 2 for the 3G data. In this mode, the data is presented on the DOUT[19:10] pins, with DOUT[9:0] being forced LOW. 4.9.3 Parallel Output in DVB-ASI Mode In DVB-ASI mode, the 20bit/10bit pin must be set LOW to configure the output parallel bus for 10-bit operation. DVB-ASI mode is enabled when the AUTO/MAN bit is LOW, SMPTE_BYPASS pin is LOW and the DVB_ASI pin is HIGH. The extracted 8-bit data is presented on DOUT[17:10] such that DOUT[17:10] = HOUT ~ AOUT, where AOUT is the least significant bit of the decoded transport stream data. In addition, the DOUT19 and DOUT18 pins are configured as DVB-ASI status signals WORDERR and SYNCOUT respectively. 10-bit multiplexed SD format LOW HIGHX HIGH LOW Driven LOW Luma/Chroma 10-bit data output SD format LOW HIGH X LOW LOW Driven LOW DATA 20-bit demultiplexed 3G format HIGHLOW HIGHHIGHLOW Data Stream Two* Data Stream One* DVB-ASI format LOW HIGHX − HIGH DOUT19 = WORD_ERR DOUT18 = SYNC_OUT DOUT17 = H_OUT DOUT16 = G_OUT DOUT15 = F_OUT DOUT14 = E_OUT DOUT13 = D_OUT DOUT12 = C_OUT DOUT11 = B_OUT DOUT10 = A_OUT *In 3G Mode, the data streams can be swapped at the output through the host interface. NOTE: When in Auto Mode, swap RATE_SEL with RATE_DET. Table 4-5:GS2970A Output Video Data Format Selections (Continued) Output Data Format Pin/Register Bit Settings DOUT[9:0] DOUT[19:10] 20BIT /10BIT RATE_ SEL0 RATE_ SEL1 SMPTE_ BYPASS DVB-ASI |
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