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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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CS43131 датащи(PDF) 99 Page - Cirrus Logic |
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CS43131 датащи(HTML) 99 Page - Cirrus Logic |
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99 / 156 page  DS1155F1 99 CS43131 5.14 Headphone Load Measurement 5.14 Headphone Load Measurement The CS43131 can be configured to measure the impedance of headphone load. Please refer to Section 4.5.2 for a description of headphone load detection. The following subsections describe the steps needed to measure DC impedance or both AC/DC impedance of the headphone. 53 Configure PCM Path Signal Control PCM Path Signal Control 1. 0x90003 0xEC PCM_RAMP_DOWN PCM_VOL_BEQA PCM_SZC PCM_AMUTE PCM_AMUTEBEQA PCM_MUTE_A PCM_MUTE_B 1 1 10 1 1 0 0 Soft ramp down of volume on filter change Volume setting on both channels controlled by PCM_VOLUME_A Enable soft ramp Mute after reception of 8192 samples of 0 or -1. Mute only when AMUTE condition is detected on both channels Function is disabled Function is disabled PCM Path Signal Control 2. 0x90004 0x00 Reserved PCM_INV_A PCM_INV_B PCM_SWAP_CHAN PCM_COPY_CHAN 0000 0 0 0 0 Disable all functions in this register 54 Read interrupt status 2 register Interrupt Status 2. 0xF0001 Clear sticky bits 55 Enable ASP Interrupts Interrupt Mask 2. 0xF0011 0x07 ASP_OVFL_INT_MASK ASP_ERROR_INT_MASK ASP_LATE_INT_MASK ASP_EARLY_INT_MASK ASP_NOLRCK_INT_MASK Reserved 0 0 0 0 0 111 Enable ASP_OVFL interrupt Enable ASP_ERROR interrupt Enable ASP_LATE interrupt Enable ASP_EARLY interrupt Enable ASP_NOLRCK interrupt 56 Enable ASP Clocks Pad Interface Configuration. 0x1000D 0x00 Reserved XSP_3ST ASP_3ST 0000 00 0 0 Enable ASP serial clocks 57 Enable ASP Power Down Control. 0x20000 0x24 PDN_XSP PDN_ASP PDN_DSDIF PDN_HP PDN_XTAL PDN_PLL PDN_CLKOUT Reserved 0 0 1 0 0 1 0 0 Enable ASP 58 Enable PCM/DoP mix 59 Configure DSD Volume DSD Volume A. 0x70001 0x0C DSD_VOLUME_A 0x0C Channel A volume set to 0 dB 60 Prepare for PCM/DoP Mix operation DSD and PCM Mixing Control. 0x70005 0x02 Reserved MIX_PCM_PREP MIX_PCM_DSD 0000 00 1 0 Enable PCM playback path for DoP Mixing 61 Wait for 6 ms 62 Enable PCM/DoP mix DSD and PCM Mixing Control. 0x70005 0x03 Reserved MIX_PCM_PREP MIX_PCM_DSD 0000 00 1 1 Enable PCM/DoP Mixing Example 5-18. DoP and PCM Mixing (Cont.) STEP TASK REGISTER/BIT FIELDS VALUE DESCRIPTION |
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