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CS43131 датащи(PDF) 77 Page - Cirrus Logic |
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CS43131 датащи(HTML) 77 Page - Cirrus Logic |
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77 / 156 page ![]() DS1155F1 77 CS43131 5.13 Example Sequences 8 Configure PLL. Input is 22.5792 MHz. Output is 24.576 MHz. 9 Power up PLL Power Down Control. 0x20000 0xF2 PDN_XSP PDN_ASP PDN_DSDIF PDN_HP PDN_XTAL PDN_PLL PDN_CLKOUT Reserved 1 1 1 1 0 0 1 0 Power up PLL 10 Set PLL predivide PLL Setting 9. 0x40002 0x03 Reserved PLL_REF_PREDIV 0000 00 11 Divide PLL Reference by 8 11 Set PLL Output Divide PLL Setting 6. 0x30008 0x08 PLL_OUT_DIV 0x08 Divide PLL output by 8 12 Set Fractional portion of PLL divide ratio PLL Setting 2. 0x30002 0x00 PLL_DIV_FRAC_0 0x00 PLL Setting 3. 0x30003 0xF7 PLL_DIV_FRAC_1 0xF7 PLL Setting 4. 0x30004 0x06 PLL_DIV_FRAC_2 0x06 13 Set integer portion of PLL divide ratio PLL Setting 5. 0x30005 0x44 PLL_DIV_INT 0x44 14 Set PLL Mode PLL Setting 8. 0x3001B 0x01 Reserved PLL_MODE Reserved 0000 00 0 1 Use 500/512 factor 15 Set PLL Calibration Ratio PLL Setting 7. 0x3000A 0x8B PLL_CAL_RATIO 0x8B Set PLL Cal Ratio to 139 16 Read Interrupt Status 1 register (0xF0000) to clear any pending interrupts. 17 Enable PLL Interrupts Interrupt Mask 1. 0xF0010 0xE1 DAC_OVFL_INT_MASK HPDETECT_PLUG_INT_MASK HPDETECT_UNPLUG_INT_MASK XTAL_READY_INT_MASK XTAL_ERROR_INT_MASK PLL_READY_INT_MASK PLL_ERROR_INT_MASK PDN_DONE_INT_MASK 1 1 1 0 0 0 0 1 Enable PLL Ready and Error Interrupts 18 Start PLL PLL Setting 1. 0x30001 0x01 Reserved PLL_START 0000 000 1 Start PLL 19 Configure DSDIF to playback 64•Fs DSD stream. DSDIF is configured as Slave 20 Configure DSD Volume DSD Volume A. 0x70001 0x00 DSD_VOLUME_A 0x00 Channel A volume set to 0dB 21 Configure DSD path Signal Control1 DSD Processor Path Signal Control 1. 0x70002 0xCC DSD_RAMP_UP DSD_VOL_BEQA DSD_SZC Reserved DSD_AMUTE DSD_AMUTE_BEQA DSD_MUTE_A DSD_MUTE_B 1 1 0 0 1 1 0 0 DSD Volume B equals DSD volume A Immediate change Mute occurs after 256 repeated 8-bit DSD mute patterns Mute happens only when mute pattern is detected in both channels Function is disabled Function is disabled 22 Configure DSD Interface DSD Interface Configuration. 0x70003 0x00 Reserved DSD_M/SB DSD_PM_EN DSD_PM_SEL 0000 0 0 0 0 DSD is clock slave Function is disabled Function is disabled Example 5-8. Startup to DSD Playback (Cont.) STEP TASK REGISTER/BIT FIELDS VALUE DESCRIPTION |
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