ES9842PRO datasheet(21/167 Pages) ESS

21 / 167 page

VERSION 0.5

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

ES9842 PRO Product Datasheet

GPIO Audio Data Configurations

The following table shows the configurations possible using GPIO#_config Aux Inputs, Aux Outputs, and RAW data outputs

on the ES9842 PRO.

In certain modes, the data output pins may be re-mapped to GPIO pins 4-6. These scenarios are labeled “[optional]” in the

table below. The channel order may also be changed in these modes. Although it is not denoted in the table, the data output

in Slave Mode may also be re-mapped to the same pins.

GPIO #

1 (AUX Inputs)

(Slave mode)

2 (AUX Outputs) (Master mode)

3 (Raw Data

Output)

GPIO1

I2S/TDM in BCK,

DSD in clock

I2S master

BCK

TDM master

BCK

DSD master

clock out

PDM

clock

Raw Data Clock

output

GPIO2

I2S/TDM in WS

I2S master

TDM master WS

Raw Data[0] out

GPIO3

I2S out DATA

[optional]6

(default)

TDM out DATA

[optional]6

(default)

DSD out

DATA7

PDM out

DATA

Raw Data[1] out

GPIO4

TDM cascade data

input

Cascade mode for

multiple devices

I2S out DATA

[optional]6

TDM out DATA

[optional]6

DSD out

DATA7

PDM out

DATA

Raw Data[2] out

GPIO5

I2S decoder data

input

I2S out

DATA

[optional]6

TDM out DATA

[optional]6

DSD out

DATA7

Raw Data[3] out

GPIO6

I2S out

DATA

[optional]6

TDM out DATA

[optional]6

DSD out

DATA7

Raw Data[4] out

GPIO7

Raw Data[5] out

GPIO8

Raw Data[6] out

GPIO9

INTERRUPT (Triggered by any of the 4 channels)

INTERRUPT

GPIO10

GPIO11

Table 3 - GPIO Audio Data Configurations

Using the TDM GPIO Re-mapping Registers, the data may be configured to output GPIO pins 4-6. In order to do this,

The DSD channel order can be changed via Register 19: DSD_DATA_OUTPUT_MAPPING.

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