PCM5310PAPR datasheet(36/103 Pages) TI

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MUTE CONTROL TIMING DURING CLOCK CHANGES

I CSetting

ClockSourceB

ClockSourceA

241

8f (ADC)

1f (DAC)

(1)

Thedigital andanaloginputsshouldbezerodataatfirst.Thenusethefollowingsettingprocedure:

a)Disablezerocrossingdetection.

b)Enableanalogordigitaloutputmute.

c)Changetheclocksource.

d)Disabletheanalogordigitalmute.

NOTE:

35 f (ADC)

25f (DAC)

PCM5310

SLES244 – FEBRUARY 2009 ............................................................................................................................................................................................ www.ti.com

The PCM5310 has six audio interface ports and can change from the current source to another source. However,

the analog output or digital output may have an audible pop noise when changing or stopping clocks. It is

recommend to use the mute control with zero data input and waiting time to avoid pop noise and clean up the

internal circuit via I2C. Figure 43 illustrates the details.

Note that the digital and analog inputs should be zero data initially. After that, use the following steps:

1. Disable zero crossing detection.

2. Enable the analog or digital output mute.

3. Change the clock source.

4. Disable the analog or digital mute.

(1)

Value depends on attenuation level setting in Registers 82, 83, 92, and 93.

Figure 43. Mute Control Timing During Clock Changes

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