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CS43130 Datasheet(PDF) 59 Page - Cirrus Logic |
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CS43130 Datasheet(HTML) 59 Page - Cirrus Logic |
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59 / 137 page  DS1073F1 59 CS43130 5.7 Headphone Power Down Sequences To disable HPINx path when EXT_VCPFILT = 1, the following sequences should be followed: 5.7 Headphone Power Down Sequences Examples of power down sequences for PCM and DSD are shown in Ex. 5-5 and Ex. 5-6, respectively. Follow the stated sequence every time to shut down the headphone output. The sequence assumes that the PDN_DONE_INT interrupt bit is unmasked. 5.7.1 PCM Power Down Sequence Example 5-4. HPINx Disable when EXT_VCPFILT = 1 TASK REGISTER/BIT FIELDS VALUE DESCRIPTION Disable headphone input 0x10010 0x99 HP Output Control 1. 0x80000 0x30 HP_CLAMPA HP_CLAMPB OUT_FS HP_IN_EN Reserved 0 0 11 0 000 Disable HPIN 0x20019 0x00 0x10010 0x00 Example 5-5. PCM Power Down Sequence STEP TASK REGISTER/BIT FIELDS VALUE DESCRIPTION 1 Enable PDN_DONE interrupt Interrupt Mask 1. 0xF0010 data(0xF0010) AND (0xFE) 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 x x x x x x x 0 Enable PDN_DONE interrupt 2 Pop-free power down 0x10010 0x99 0xC0002 0x12 0xC000E 0x02 0xC0009 0x12 3 Mute PCM Path Signal Control 1. 0x90003 data(0x90003) OR (0x03) PCM_RAMP_DOWN PCM_VOL_BEQA PCM_SZC Reserved PCM_AMUTE PCM_AMUTEBEQA PCM_MUTE_A PCM_MUTE_B x x x x x x 1 1 Mute channel A Mute channel B 4 Wait time delay. If PCM_SZC = 2, then delay = (255 - max(PCM_VOLUME_A, PCM_VOLUME_B)) / 2 ms. Else, delay = 130 ms. 5 Power down amplifier Power Down Control. 0x20000 data(0x20000) OR (0x10) PDN_XSP PDN_ASP PDN_DSDIF PDN_HP PDN_XTAL PDN_PLL PDN_CLKOUT Reserved x x x 1 x x x x Turn off HP 6 Wait for interrupt. Check for PDN_DONE_INT = 1 in Interrupt Status 1 register (0xF0000). 7 Reset data buffer 0x90097 0x01 |
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