CS53L21 datasheet(45/66 Pages) CIRRUS

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DS700PP1

CS53L21

ADCx 20 dB Digital Boost (ADCx_DBOOST)

Default: 0

0 - Disabled

1 - Enabled

Function:

Applies a 20 dB digital gain to the input signal on ADC channel x, regardless of the input path.

MIC Bias Select (MICBIAS_SEL)

Default: 0

0 - MICBIAS on AIN3B/MICIN2 pin

1 - MICBIAS on AIN2B pin

Function:

Determines the output pin for the internally generated MICBIAS signal. If set to ‘0’b, the MICBIAS is output

on the AIN3B/MICIN2 pin. If set to ‘1’b, the MICBIAS is output on the AIN2B pin.

MIC Bias Level (MICBIAS_LVL[1:0])

Default: 00

00 - 0.8 x VA

01 - 0.7 x VA

10 - 0.6 x VA

11 - 0.5 x VA

Function:

Determines the output voltage level of the MICBIAS output.

MIC X Preamplifier Boost (MICX_BOOST)

Default: 0

0 - +16 dB Gain

1 - +32 dB Gain

Function:

Determines the amount of gain applied to the microphone preamplifier for channel x.

6.6

ADC Control (Address 06h)

ADCX High-Pass Filter Enable (ADCX_HPFEN)

Default: 1

0 - High-pass filter is disabled

1 - High-pass filter is enabled

Function:

When this bit is set, the internal high-pass filter will be enabled for ADCx. When set to ‘0’, the high-pass filter

will be disabled. For DC measurements, this bit must be cleared to ‘0’. “ADC Digital Filter Characteristics”

on page 14.

432

ADCB_HPFEN ADCB_HPFRZ ADCA_HPFEN ADCA_HPFRZ

SOFTB

ZCROSSB

SOFTA

ZCROSSA

CS53L21 数据表(PDF) 45 Page - Cirrus Logic

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CS53L21 数据表(PDF) 45 Page - Cirrus Logic

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