Espressif Systems ESP32-LyraTD-DSPG User Manual page 5

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Provides power supply to the whole system. It is recommended that the system be
connected to a power adapter for sufficient current supply.
2. ESP32-WROVER-B module
This is a powerful, general-purpose, Wi-Fi+BT+BLE dual core MCU module, targeting a
wide variety of applications ranging from low-power sensor networks to the most
demanding tasks, such as voice encoding/decoding, music streaming and runs voice
assistant client SDK.
3. DBMD5P DSP
DBMD5P is a dual core, programmable voice processor which supports various
functionalities such as voice trigger (VT), voice commands, voice authentication (VA),
acoustic echo cancellation (AEC). This audio DSP is used for wake-word detection. It
captures audio data from an external array of three digital microphones.
4. Audio codec
E8388 audio codec is used for digital audio conversion to analog audio output.
5. Audio amplifier
This audio power amplifier sends audio signals from the Codec to external speakers for
playback.
6. CP2102N USB-to-UART Chip
An upgraded version of the CP2102 chip supports USB-to-UART conversion.
�� Note:
The IC design of this chip is a little different from CP2102.
7. USB Port
This is a normal USB communication port between PC and the main board.
8. Earphone Connector
Used for plugging in earphones/headphone. Audio output is via Codec.
9. Speaker Connector
Supports one external speaker output via Power Amplifier.
10.FPC connector
This connection is used for connecting external sub board consisting of microphone
array, buttons and LEDs via flex cable.
11.Mini Din connector
This connection can be used for connecting the microphone cable, if there is such a
requirement. By default, this connector is not mounted on the main board.
12.Sub board
Sub board consists of LEDs and LED driver along with function keys and Mic array
connected via FPC cable.
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1. Overview
2019.07