CS43130 Datasheet, PDF (26/137 Pages) Cirrus Logic – 130-dB, 32-Bit High-Performance DAC with Integrated Headphone Driver

CS43130
4.1 Overview
Before ASP, XSP, or DSDIF can safely power down, PDN_HP must be asserted, and PDN_DONE_INT must be present.
For XTAL or PLL used as the source of internal MCLK, PDN_HP needs to be set first and MCLK source needs to be
properly switched away before PDN_XTAL or PDN_PLL is set. If PLL output is only used as the source of CLKOUT, PDN_
PLL can be set without PDN_HP being asserted. If the steps described above are not followed, the CS43130 enters an
unresponsive state.
PDN_CLKOUT does not require PDN_HP to be set before it is asserted.
PDN_HP should be set before using headphone input path and load detection function. Refer to the functional description
of these two components for further details.
Recommended power-up and power-down sequences can be found in the Section 5.2.
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DS1073F1