ES9080 datasheet(10/146 Pages) ESS

10 / 146 page

CONFIDENTIAL ADVANCE INFORMATION 0.4.3

ES9080 Product Datasheet

ESS TECHNOLOGY, INC. 109 Bonaventura Drive, San Jose, CA 95134, USA Tel (408) 643-8800 WWW.ESSTECH.COM

Digital Features

Digital Signal Path

SABRE DAC DIGITAL PATH (8 CHANNEL)

De-emphasis

Filter

Oversampling

Filter

Volume

Control &

Automute

16x IIR

Filter

DRE

Noise Shaped

Modulators

THD

Compensation

TDM/I2S

DSD/DoP

SPDIF

OUT

SPDIF Out 1

SPDIF Out 2

Figure 3 - Digital signal path

De-emphasis Filter

The De-emphasis filters are only applicable to channels 1 & 2 only.

The de-emphasis filters can be enabled or bypassed through the BYPASS_DEEMPH registers. The filters are configured for a 48kHz FS by default,

however this can be changed via the SEL_DEEMPH register.

De-emphasis Filter Configuration Registers

•

Volume Control

This volume control is intended for use during audio playback. Each channel can be digitally attenuated from 0dB to –127.5dB. When a new volume

level is set, the attenuation circuit will ramp softly to the new level at a rate specified in the DAC VOL UP RATE, DAC VOL DOWN RATE and DAC

VOL DOWN RATE FAST registers.

By default, channel volumes are updated as soon as the volume registers are written. However, the volume control can only be changed once the

RUN_VOLUME bit is toggled. This feature can be enabled or disabled through the FORCE_VOLUME bit

Each output channel has an independent volume control. The attenuation for each channel can be independent or synchronized in pairs by setting

the DAC_USE_MONO_VOLUME bit.

Volume Control Registers

•

Registers 94-101: VOLUMEx

•

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