Read the Docs Template Documentation, Release
MicroSD Card
The development board supports a MicroSD card in SPI/1-bit/4-bit modes, and can store or play
audio files in the MicroSD card. See
for pinout details. Note that
JTAG
cannot be used and
should be disconnected by setting
Function DIP Switch
when
MicroSD Card
is in operation, because some of
signals are shared by both devices.
I2S Header
Provides access to the I2S interface. Both
ESP32-WROVER Module
and
Audio Codec Chip
are
connected to this interface. See
for pinout details.
Left Microphone
Onboard microphone connected to IN1 of the
Audio Codec Chip
.
AUX Input
Auxiliary input socket connected to IN2 (left and right channel) of the
Audio Codec Chip
. Use a 3.5
mm stereo jack to connect to this socket.
Headphone Output
Output socket to connect headphones with a 3.5 mm stereo jack.
Fig. 1.5: ESP32-LyraT V4.2 Board Layout
Right Microphone
Onboard microphone connected to IN1 of the
Audio Codec Chip
.
Left Speaker Output
Output socket to connect 4 ohm speaker. The pins have a standard 2.54 mm / 0.1” pitch.
Right Speaker Output
Output socket to connect 4 ohm speaker. The pins have a standard 2.54 mm / 0.1” pitch.
PA Chip
A power amplifier used to amplify stereo audio signal from the
Audio Codec Chip
for driving two 4-ohm
speakers.
1.10. Related Documents
13
Summary of Contents for ESP32-LyraT
Page 1: ...Read the Docs Template Documentation Release Read the Docs Jul 01 2018...
Page 2: ......
Page 4: ...ii...
Page 6: ...Read the Docs Template Documentation Release 2 Contents...
Page 92: ...Read the Docs Template Documentation Release 88 Chapter 4 Resources...
Page 94: ...Read the Docs Template Documentation Release 90 Chapter 5 Copyrights and Licenses...
