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GS2970A Datasheet(PDF) 93 Page - Semtech Corporation |
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GS2970A Datasheet(HTML) 93 Page - Semtech Corporation |
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93 / 150 page  GS2970A 3Gb/s, HD, SD SDI Receiver Data Sheet 54244 - 2 September 2012 93 of 150 waiting for the status boundary, the device sets the appropriate ACS_APPLY_WAIT[A:D] flag. Table 4-24 shows the host interface default settings for the Audio Channel Status block. The audio de-embedder automatically generates the CRC word. 4.19.3.9 Audio Mute When the MUTE bits in the host interface are set HIGH, the audio outputs are muted (all audio sample bits are set to zero). To set all the audio output channels to mute, set the host interface MUTE_ALL bit HIGH. Table 4-24: Audio Channel Status Information Registers Name Description Default ACSR[7-0] Audio channel status block byte 0 set. Used when ACS_REGEN is set HIGH 85h ACSR[15-8] Audio channel status block byte 1 set. Used when ACS_REGEN is set HIGH 08h ACSR[23-16]Audio channel status block byte 2 set. Used when ACS_REGEN is set HIGH 28h (SD) 2Ch (HD) ACSR[31-24]: ACSR[183-176] Audio channel status block data for bytes 3 to 22. Used when ACS_REGEN is set HIGH 00h ACS_REGEN Audio channel status regenerate 0 ACS_APPLY Apply new ACSR data 0 ACS_APPLY_W AIT[A:D] Waiting to apply new ACSR data 0 ACS[7-0]: ACS[183-176] Audio channel status block data for bytes 0 to 22 00h: 00h Table 4-24:Audio Channel Status Block for Regenerate Mode Default Settings Name Byte Bit Default Mode PRO 0 0 1b Professional use of channel status block Emphasis 0 2-4 100b 100b None. Rec. manual override disabled Sample Frequency0 6-7 01b 48kHz. Manual override or auto disabled Channel Mode1 0-3 0001b Two channels. Manual override disabled AUX 2 0-2 000bSD Modes: Maximum audio word length is 20 bits 001b HD Mode: Maximum audio word length is 24 bits Source Word Length 2 3-5 101b Maximum word length (based on AUX setting). 24-bit for HD Mode; 20-bit for SD Modes All other bits set to zero |
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