Datasheet

ADAU1381

Rev. B | Page 78 of 84

Bit 3, Output Precharge

The output precharge system allows the outputs to be biased before

they are enabled and prevents pops or clicks from appearing on

the output. This bit should be set to 1 at all times.

Bit 2, Zero-Crossing Detector

Setting this bit to 0 disables the zero-crossing detector for beep

playback.

Bit 1, Digital Microphone

Setting this bit to 0 disables the digital microphone input.

Bit 0, DAC Engine

Setting this bit to 0 disables the DACs.

Table 66. Digital Power-Down 1 Register

Bits Description Default

[7:4] Reserved

3 Output precharge 1

0: disabled

1: enabled

2 Zero-crossing detector 1

0: disabled

1: enabled

1 Digital microphone 0

0: disabled

1: enabled

0 DAC engine 0

0: disabled

1: enabled