ES9826 datasheet(11/88 Pages) ESS

11 / 88 page

ES9826 Datasheet

VERSION 0.1.2

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

Hardware Mode

The ES9826 hardware modes can be set with external pull-up and/or pull-down resistors. These modes configure the ADC

for different output modes and sample rates. Hardware modes also support stereo digital PDM microphones as inputs.

Hardware modes are set with pins:

• MODE (Pin 5)

• HW0 (Pin 4)

• HW1 (Pin 3)

• HW2 (Pin 2)

• HW3/GPIO6 (Pin 28)

• MUTE_MCLK_CTRL (Pin 1)

Design Information

Hardware mode pins must be configured correctly for the desired hardware mode. Some guidelines include the following:

• The HW0 and HW1 pins are always 1/0 and do not require a pull-up or pull-down resistor.

• All HW pins must be set with CHIP_EN low as shown in the Recommended Hardware Mode Setup Sequence

MODE

AVDD or GPIO

47k

MODE

47k

Pull-up

Pull-down

GND or GPIO

Figure 2 – Example hardware mode pin configurations

Input/Output Mode

In hardware modes #0 - #15, HW3 (Pin 28) sets the input mode between analog inputs through the ADC or digital PDM

microphones. Hardware modes #16 - #30 are for TDM LJ slave modes and do not support S/PDIF output, or PDM input.

S/PDIF output in hardware mode is only supported with the Master Mode modes #0 - #7

State

Input

Output

HW3/GPIO6

Analog – ADC

See table 6.

PCM output

Pull 0

S/PDIF output

Pull 1

Digital – PDM

See table 7.

S/PDIF output

PCM output

Table 5 - Input modes controlled through HW3 (pin 28)

ES9826 Datasheet(PDF) 11 Page - ESS Technology,Inc

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