Espressif ESP32-S2 Programming Manual page 54

Chapter 1. Get Started
Overview The ESP-LyraT-8311A is mainly designed for audio applications. However, you can use your creativity
to come up with any other use cases.
Description of Components
wise.
Reserved means that the functionality is available, but the current version of the kit does not use it.
Key Component
Extension Header
Function Button
Microphone
Headphone Connector
Speaker Connector
PA
External Mic-Matrix Connec-
tor
ADC
Mono Audio Codec
Start Application Development
condition with no obvious signs of damage.
Required Hardware
Espressif Systems
Fig. 34: ESP-LyraT-8311A - front (click to enlarge)
The description of components starts from the top right corner and then goes clock-
Description
Male Extension Header on the flip side is for mounting onto main board's
Extension Header; Female Extension Header is for mounting other boards that
have a Male Extension Header
This board has six programmable buttons
Supports Electret and MEMS microphones; this extension board is supplied
with an electret microphone
6.3 mm (1/8") stereo headphone connector
Connect an external speaker to the 2-pin connector
3 W Audio signal amplifier for the external speaker
(Reserved) FPC connector for external Mic-Matrix (microphone boards)
(Reserved) high-performance ADC/ES7243: 1 channel for microphone, 1
channel for acoustic echo cancellation (AEC) function
ES8311 audio ADC and DAC; it can convert the analog signal picked up by
the microphone or convert digital signal to play it back through a speaker or
headphones
Before powering up your ESP-LyraT-8311A, please make sure that it is in good
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Release v4.4