ES9820 datasheet(13/117 Pages) ESS

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CONFIDENTIAL ADVANCE INFORMATION 0.3

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

ES9820 Product Datasheet

GPIO Audio Data Configurations

The following table shows the configurations possible using GPIO#_config Aux Inputs, Aux Outputs on the ES9820.

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)

GPIO1

I2S/TDM in BCK, DSD in

clock

I2S master BCK

TDM master BCK

DSD master

clock out

PDM clock

GPIO2

I2S/TDM in WS

I2S master WS

TDM master WS

GPIO3

I2S out DATA

[optional]5

(default)

TDM out DATA

[optional]5

(default)

DSD out DATA6

PDM out

DATA

GPIO4

TDM cascade data input

Cascade mode for

multiple devices

I2S out DATA

[optional]5

TDM out DATA

[optional]5

DSD out DATA6

PDM out

DATA

GPIO5

I2S decoder data input

I2S out DATA

[optional]5

TDM out DATA

[optional]5

DSD out DATA6

GPIO6

I2S out DATA

[optional]5

TDM out DATA

[optional]5

DSD out DATA6

GPIO7

GPIO8

GPIO9

INTERRUPT (Triggered by either of the 2 channels)

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 Register 11 [7]:

TDM_GPIO456 must also be enabled.

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

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