CS42418 Datasheet, PDF (48/67 Pages) Cirrus Logic – 110 dB, 192kHz 8-Ch CODEC WITH PLL

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)
7
Mode1
6
Mode0
5
Polarity
4
Function4
3
Function3
2
Function2
1
Function1
0
Function0
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.
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