CS42428 datasheet(58/73 Pages) CIRRUS

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DS605F1

CS42428

6.21.2 CHANNEL MUTES SELECT (M_AOUTXX)

Default = 11111

0 - Channel mute is not mapped to the MUTEC pin

1 - Channel mute is mapped to the MUTEC pin

Function:

Determines which channel mutes will be mapped to the MUTEC pin. If no channel mute bits are

mapped, then the MUTEC pin is driven to the “active” state as defined by the POLARITY bit. These

Channel Mute Select bits are “ANDed” together in order for the MUTEC pin to go active. This means

that if multiple Channel Mutes are selected to be mapped to the MUTEC pin, all corresponding chan-

nels must be muted before the MUTEC will go active.

6.22

General-Purpose Pin Control (addresses 29h to 2Fh)

6.22.1 MODE CONTROL (MODEX)

Default = 00

00 - Reserved

01 - Mute Mode

10 - GPO/Overflow Mode

11 - GPO, Drive High Mode

Function:

Mute Mode - The pin is configured as a dedicated mute pin. The muting function is controlled by the

Function bits.

GPO, Drive Low / ADC Overflow Mode - The pin is configured as a general-purpose output driven low

or as a dedicated ADC overflow pin indicating an over-range condition anywhere in the ADC signal

path for either the left or right channel. The Functionx bits determine the operation of the pin. When

configured as a GPO with the output driven low, the driver is a CMOS driver. When configured to iden-

tify an ADC Overflow condition, the driver is an open drain driver requiring a pull-up resistor.

GPO, Drive High Mode - The pin is configured as a general purpose output driven high.

6.22.2 POLARITY SELECT (POLARITY)

Default = 0

Function:

Mute Mode - If the pin is configured as a dedicated mute output pin, the polarity bit determines the

polarity of the mapped pin according to the following

0 - Active low

1 - Active high

GPO, Drive Low / ADC Overflow Mode - If the pin is configured as a GPO, Drive Low / ADC Overflow

Mode pin, the polarity bit is ignored. It is recommended that in this mode this bit be set to 0.

GPO, Drive High - If the pin is configured as a general-purpose output driven high, the polarity bit is

ignored. It is recommended that in this mode this bit be set to 0.

543

Mode1

Mode0

Polarity

Function4

Function3

Function2

Function1

Function0

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