CS42418 datasheet(48/67 Pages) CIRRUS

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CS42418

5.21.2 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, then all corresponding

channels must be muted before the MUTEC will go active.

5.22

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

5.22.1 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/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 identify 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.

5.22.2 POLARITY SELECT (POLARITY)

Default = 0

Function:

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

the polarity of the mapped pin according to the following

0 - Active low

1 - Active high

GPO/Overflow Mode - If the pin is configured as a GPO/Overflow Mode pin, the polarity bit is ignored.

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

GPO, Drive High Mode - 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.

76543

210

Mode1

Mode0

Polarity

Function4

Function3

Function2

Function1

Function0

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