ES9218PC datasheet(19/101 Pages) ESS

Part #	ES9218PC

Description	32-bit Stereo Low Power DAC with Headphone Amplifier, Analog Volume Control, and Output Switch

PDF	101 Pages

Scroll/Zoom	100%

Manufacturer	ESS [ESS Technology,Inc]

Direct Link	http://www.esstech.com

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19 / 101 page

ES9218P Datasheet

CONFIDENTIAL ADVANCE INFORMATION 1.8

December 6, 2018

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

Output Switch

The output signal is selected by an ultra-low THD analog switch that connects either to the HiFi audio headphone amplifier or to an alternate audio

source. A typical alternate source may be voice or another DAC. There are two different ways to use the output switch:

LowFi Mode

The ultra-low THD analog switch may be controlled using Register 32: Amplifier Configuration (0x20). This allows audio to pass from an

alternate source to the output. The digital core remains powered on and ready for a quick transition back to HiFi mode. All supplies must

be enabled.

Low Power Bypass Mode

The ultra-low THD analog switch may be controlled using GPIO2 after RESETb is asserted and the chip is in standby. This allows audio to

pass from an alternate source to the output without the use of the digital core. AVCC_HP and AVCC_CP supplies must be enabled.

This mode is activated when RESETB = pulled down and GPIO2=pulled up.

ES9218PC Datasheet(PDF) 19 Page - ESS Technology,Inc