ES9219 datasheet(15/67 Pages) ESS

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ES9219 Datasheet

CONFIDENTIAL ADVANCE INFORMATION 1.0.4

February 27, 2020

ESS TECHNOLOGY, INC. 237 South Hillview Drive, Milpitas, CA 95035, USA Tel (408) 643-8800 • Fax (408) 643-8801

Standby Mode

For lowest power consumption, the following should be performed to enter stand-by mode:

Shut down the amplifier portion of the chip with Register 32: AMPLIFIER CONFIGURATION.

1. Pull RESETB low. This will:

a. Shut off the DACs, oscillator and internal regulators.

b. Force all digital I/O pins into tri-state mode

2. If XI is supplied externally, it should be stopped at a logic low level

3. Disable any power supplies connected to the chip

To resume from standby mode:

1. Enable all power supplies

2. Pull RESETB up

3. Reinitialize all registers

To resume from standby mode, bring RESETB to a logic-high and reinitialize all registers.

OPERATION Mode

RESETB

GPIO2

HiFi Mode

(DAC & HPA: ON, AUX SW: OFF)

AUX Mode

(DAC & HPA: OFF, AUX SW: ON)

Standby(Shutdown) Mode

(DAC, HPA, AUX SW: OFF)

DVDD Supply

The ES9219 is equipped with a regulated DVDD supply powered from AVDD. The internal DVDD regulator should be decoupled to DGND with a

capacitor that maintains a minimum value of 1

F at 1.2V over the target operating temperature range.

External 1.2V can be supplied if the customer would prefer to do so but setting the SEL1V in Register 46: ANALOG CONTROL OVERRIDE

OSF Bypass

The oversampling FIR filter can be bypassed using bypass_osf in Register 7: FILTER SHAPE AND SYSTEM MUTE, sourcing data directly into

the IIR filter. The audio input should be oversampled at 8 x fs rate when OSF is bypassed to have the same IIR filter bandwidth as PCM audio

sampled at fs rate. For example, an external signal at 44.1kHz can be oversampled externally to 8 x 44.1kHz = 352.8kHz and then applied to the

serial decoder in either I2S or LJ format. The maximum sample rate that can be applied is 768kHz (8 x 96kHz).

DSD Filter

A DSD filter with cutoff at 47kHz scaled by fs/44100 is available. See DSD FILTER Characteristics for more information.

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