Datasheet

MAX9867

Ultra-Low Power Stereo Audio Codec

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Table 16. Mode Configuration Register

ADDRESS

Mode DSLEW VSEN ZDEN 0 JDETEN HPMODE 0x16

BITS FUNCTION

DSLEW

Digital Volume Slew Speed

0 = Digital volume changes are slewed over 10ms.

1 = Digital volume changes are slewed over 80ms.

VSEN

Volume Change Smoothing

0 = Volume changes slew through all intermediate values.

1 = Volume changes occur in one step.

ZDEN

Line Input Zero-Crossing Detection

0 = Line input volume changes occur at zero crossings in the audio waveform or after 62ms if no zero

crossing occurs.

1 = Line-input volume changes occur immediately.

JDETEN

Jack Detection Enable

SHDN = 0: Sleep Mode

Enables pullups on LOUTP and JACKSNS/AUX to detect jack insertion. LSNS and JKSNS are valid.

LOUTP detection is only valid in differential and capacitorless output modes.

SHDN = 1: Normal Mode

Enables the comparator circuitry on JACKSNS/AUX to detect voltage changes. JKMIC is valid if the

microphone circuitry is enabled.

Note: AUXEN must be set to 0 for jack detection to function.

Headphone Amplifier Mode

HPMODE Mode

000 Stereo differential (clickless)

001 Mono (left) differential (clickless)

010 Stereo capacitorless (clickless)

011 Mono (left) capacitorless (clickless)

100 Stereo single-ended (clickless)

101 Mono (left) single-ended (clickless)

110 Stereo single-ended (fast turn-on)

111 Mono (left) single-ended (fast turn-on)

HPMODE

Note: In mono operation, the right amplifier is disabled.