CS4525 datasheet(65/91 Pages) CIRRUS

65 / 91 page

DS726A1

CS4525

9.1.4

HP_Detect/Mute Pin Active Logic Level (HP/MutePol)

Default = 0

Function:

This bit determines the active logic level for the HP_DETECT/MUTE input signal.

9.1.5

HP_Detect/Mute Pin Mode (HP/Mute)

Default = 0

Function:

Configures the function of HP_DETECT/MUTE input pin. See “Headphone Detection & Hardware Mute

Input” on page 47 for more information.

9.1.6

Modulator Phase Shifting (PhaseShift)

Default = 0

Function:

When enabled, forces the output of the PWM modulator to output differential signals which are the inverse

of each other and have been phase shifted by 180 degrees. This causes, for instance, the differential sig-

nal pair to be exactly in phase with one another during a mute condition, thereby reducing the amount of

switching current through the load.

9.1.7

AM Frequency Shifting (FreqShift)

Default = 0

Function:

Controls the state of the PWM AM frequency shift feature. See “PWM AM Frequency Shift” on page 47

for more information.

HP/MutePol Setting

Headphone Detect/Mute Input Polarity

0 .......................................... Active low.

1 .......................................... Active high.

HP/Mute Setting

HP_DETECT/MUTE Pin Function

0 .......................................... Mute input signal.

1 .......................................... Headphone detect input signal.

PhaseShift Setting

Modulator Phase Shift State

0 .......................................... 180º phase shift disabled.

1 .......................................... 180º phase shift enabled.

FreqShift Setting

AM Frequency Shift State

0 .......................................... Frequency shift disabled.

1 .......................................... Frequency shift enabled.

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