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CS43131 Datasheet(PDF) 129 Page - Cirrus Logic |
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CS43131 Datasheet(HTML) 129 Page - Cirrus Logic |
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129 / 156 page  DS1155F1 129 CS43131 7.5 Headphone and PCM Registers 7.5.5 PCM Path Signal Control 1 Address 0x90003 R/W 76543210 PCM_RAMP_ DOWN PCM_VOL_ BEQA PCM_SZC PCM_AMUTE PCM_ AMUTEBEQA PCM_MUTE_A PCM_MUTE_B Default 10101000 Bits Name Description 7PCM_RAMP_ DOWN Soft volume ramp-down before filter mode change. A mute is performed before filter mode change and an unmute is performed after executing the filter mode change. 0 Immediate mute is performed prior to executing a filter mode change 1 (Default) This mute and unmute is controlled by PCM_SZC. 6PCM_VOL_ BEQA PCM_VOLUME_B equals PCM_VOLUME_A. 0 (Default) Volume setting of both channels are controlled independently. 1 Volume setting of both channels are controlled by PCM_VOLUME_A. PCM_VOLUME_B is ignored. 5:4 PCM_SZC Soft ramp and zero cross control. 00 Immediate change 01 In PCM mode, zero cross change 10 (Default) Soft ramp 11 In PCM mode, soft ramp and zero crossings 3 PCM_AMUTE PCM auto mute. 0 Function disabled 1 (Default) Mute occurs after reception of 8,192 consecutive audio samples of static +1, 0, or –1. A single sample of non-static data releases the mute. Detection and muting is done independently for each channel. 2PCM_ AMUTEBEQA Auto mute channel B equals channel A. 0 (Default) Function disabled. 1 Only mute when both channels AMUTE conditions are detected. 1 PCM_ MUTE_ A Channel A mute. 0 (Default) Function is disabled. 1 Channel output is muted. Muting function is affected by the PCM_SZC bits. 0 PCM_ MUTE_ B Channel A mute. 0 (Default) Function is disabled. 1 Channel output is muted. Muting function is affected by the PCM_SZC bits. 7.5.6 PCM Path Signal Control 2 Address 0x90004 R/W 76543210 — PCM_INV_A PCM_INV_B PCM_SWAP_ CHAN PCM_COPY_ CHAN Default 00000000 Bits Name Description 7:4 — Reserved 3 PCM_INV_A Channel A signal invert. 0 (Default) Function is disabled 1 Signal polarity of channel A is inverted 2 PCM_INV_B Channel B signal invert. 0 (Default) the function is disabled 1 Signal polarity of channel B is inverted 1PCM_SWAP_ CHAN Swap channels A and B at the input. This bit takes effect before PCM_COPY_CHAN. 0 (Default) Function disabled 1 Enable channel A and B swapping 0PCM_COPY_ CHAN Copy channel A to channel B. This bit takes effect after PCM_SWAP_CHAN. 0 (Default) Function disabled 1 Enable copy A to B function |
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