ES9822PRO datasheet(11/126 Pages) ESS

11 / 126 page

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

ES9822 PRO Product Datasheet

I2S decoder and Programmable Delay

The ES9822 PRO has a build in I2S decoder that can be mixed with the ASP. A programmable delay is also included to help with phase correction

when mixing.

I2S Decoder Configuration Registers:

•

Registers 59-60: I2S DECODER CONFIG

Programmable Delay Registers:

•

Registers 62-61 [8:0]: PROG_DELAY_LINE

Configuration pins for I2S decoder:

•

GPIO 1: BCK

•

GPIO 2: WS

•

GPIO 5: DATA (would be configured as an AUX Input through the GPIO configuration)

Mixing is accomplished using the ASP registers expanded on under the Volume Control

This volume control is intended for use during audio playback. Each channel can be digitally attenuated from 0dB to –84dB in 0.5dB steps. The

attenuation circuit automatically uses micro-stepping between 0.5dB register settings so that no switching noise occurs during the volume control

transition. When a new volume level is set, the attenuation circuit will ramp softly to the new level. Each 0.5dB step takes up to 64 intermediate steps

depending on the CHx VOLUME RATE setting.

Volume Level Configuration Registers

•

Volume Rate Configuration Registers

•

Audio Signal Processor (ASP) section.

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