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CX20707 Interface Diagram

DMA

DSP

Memory

DSP

DMA

DAC

DAC

ADC

Controller

DMA

Jack

Sense

Clock

Circuitry

Bias

Generator

MON

ADC

SPI

UART

Volume

Voltage

Monitor

SE or Diff

10 k line

2.5W Class-D

SE or Diff

600

or 10 k line

Capless HP

Out 32

MIC In

XTAL In/

Master In

XTAL Out

Sense

MIC Bus

ADC

SE or Diff Line In

SE or Diff Line In

SE Line In

M

M

M

09-2912

Audio

Speakers-on-a-Chip

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Doc# PBR-202455

cx20707 features

CODEC

• 5-wiredigitalaudioI/O(I2S/PCM/SPDIF),supportingfull-duplex

independent sampling rates

• One2-wireI2C or 4-wire SPI slave interface for external MCU

• UARTinterface

• EightGPIOpins

• 2.5WBTLmonoClass-DSpeakerAmplifier

• Single-endedordifferentialmonoanalogaudioinput

• Monomicrophoneinterfaceswithon-chipbiassupply

• Integrated50mWheadphonedriverwithjacksense

• Single-endedordifferentiallineout

• 24-bitDAC/ADC,SNR102dB,THD-92dBat48kHz3.3V

• Audiosamplerate:8,11.025,12,16,22.05,24,32,44.1,48,64,

88.2, 96 kHz

• 90dBdynamicrangewith0.01percentTHD+Nat4

Ω load

• SpreadSpectrumforfilter-less,lowEMIoutput

• 10-bitADCmultiplexedtosupportanalogvolume

potentiometer and DC level detection

• Flexiblepowermanagement

• Variablemasterclockrates

DSP

• Subbandacousticechosuppressionandcancellation

•Noisereductionforinboundspeech(farend)andoutbound

speech (near end)

• Dynamicloudnessadaptor

• Micautogaincontrol

• Digitalparametricequalizer(10bands/channel)

• Dynamicrangecompression

SPoC ConfigurationToolbox

• FastconfigurationtoolviaUSB-to-I2C from PC

• DeviceconfigurationandDSPparameteradjustment

• OutputlogforconvenientMCUprogramming

The CX20707 is offered in a 76-pin QFN package

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