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GS2961 Datasheet(PDF) 73 Page - Semtech Corporation |
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GS2961 Datasheet(HTML) 73 Page - Semtech Corporation |
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73 / 104 page  GS2961 3Gb/s, HD, SD SDI Receiver, with Integrated Adaptive Cable Equalizer Data Sheet 48004 - 2 November 2009 73 of 104 To start Ancillary Data Extraction, the ANC_DATA_EXT_MASK bit of the host interface must be set LOW. Ancillary data packet extraction begins in the following frame (see Figure 4-30: Ancillary Data Extraction - Step A). Figure 4-30: Ancillary Data Extraction - Step A Ancillary data is written into Bank A until full. The Y/1ANC and C/2ANC output flags can be used to determine the length of the ancillary data extracted and when to begin reading the extracted data from memory. While the ANC_DATA_EXT_MASK bit is set LOW, the ANC_DATA_SWITCH bit can be set HIGH during or after reading the extracted data. New data is then written into Bank B (up to 1024 x 16-bit words), at the corresponding host interface addresses (see Figure 4-31: Ancillary Data Extraction - Step B). ANCDATA ANCDATA ANCDATA ANCDATA ANCDATA ANCDATA ANCDATA 0 1023 Application Layer Read Pointer Internal Write Pointer Bank A ANC_DATA_SWITCH=LOW 0 1023 Bank B 800h 800h BFFh BFFh |
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