4 power control 1 (address 06h), 1 power down adc x, 2 power down digital mic x – Cirrus Logic CS42L73 User Manual

Page 82: 3 discharge filt+ capacitor, 4 power down device, Power control 1 (address 06h), P 82, Cs42l73

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DS882F1

CS42L73

6.4

Power Control 1 (Address 06h)

6.4.1

Power Down ADC x

Configures the power state of ADC channel x. All the analog front-end circuitry (PreAmp, PGA, etc.) as-
sociated with that channel is powered up or down according to this register bit.

Coupled with the PDN_DMICx controls, these bits also select between the ADC and digital mic inputs and
determine the power state of the Input Path digital processing circuitry. Refer to section

“Input Paths” on

page 59

for more details.

6.4.2

Power Down Digital Mic x

Coupled with the PDN_ADCx controls, this control selects between the ADC and digital mic inputs and
determines the power state of the digital mic interface and the Input Path digital processing circuitry. Refer
to sections

“Input Paths” on page 59

and

“DMIC Interface Powering” on page 60

for more details.

6.4.3

Discharge Filt+ Capacitor

Configures the state of the internal clamp on the FILT+ pin.

Note: This must only be set if PDN = 1b. Discharge time with an external 2.2-µF capacitor on FILT+ is

~10 ms.

6.4.4

Power Down Device

Configures the power state of the entire CS42L73.