Product Specs

ESP32-A1S Wi-Fi+BT SoC Module V1.0
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HS2DATA0
IO4
ADC2_3/RTCIO10/HSPIHD/S
DDATA1/HS2DATA1
I/O
HBIAS O MIC2 control pin
MIC2N I
MIC2 input
MIC2P I
MBIAS O MIC1 control pin
MIC1P I
MIC1 input
MIC1N I
System startup mode
PIN Default Normal operation Download
GPIO0 Pull up NC 0
GPIO2 Pull down Irrelevant item 0
Built-in LDO (VDD_SDIO) voltage
PIN Default 3.3V 1.8V
MTDI/GPIO12 Pull down 0 1
Note: the built-in flash working voltage is 3.3 V, and the model chip with built-in flash
needs to pull down or suspend the MTDI when it is powered on.
Strapping pin