Ai-Thinker Technology ESP32-A1S, Manual, Page: 8 / 18

ESP32-A1S SoC module
Page 8of 18
Copyright © 2020 Shenzhen Ai-Thinker Technology Co., Ltd All Rights Reserved
2. Pin function
ESP32-A1S module is connected to 38 interfaces, table 2.1 and table 2.2 is the interface definition.
table 2.1 ESP32-A1S Pin diagram
table 2.2 pin function definition
No. Pin Function Description
1 GND Ground
2 3V3
3.3V power supply
（
VDD
）
; The output current of the external power
supply is recommended to be above 500mA
3 SENSOR_VN GPI39,SENSOR_VN,ADC1_CH3,ADC_H,RTC_GPIO3
4 SENSOR_VP GPI36,SENSOR_VP,ADC_H,ADC1_CH0,RTC_GPIO0
5 IO34 GPI34,ADC1_CH6,RTC_GPIO4
6 IO0 GPIO0, ADC2_CH1, TOUCH1, RTC_GPIO11, CLK_OUT1,
EMAC_TX_CLK
7 IO14
GPIO14, ADC2_CH6, TOUCH6, RTC_GPIO16, MTMS, HSPICLK,
HS2_CLK, SD_CLK , EMAC_TXD2
8 IO12
GPIO12, ADC2_CH5, TOUCH5, RTC_GPIO15, MTDI, HSPIQ,
HS2_DATA2, SD_DATA2 , EMAC_TXD3
9 IO13
GPIO13, ADC2_CH4, TOUCH4, RTC_GPIO14, MTCK, HSPID,
HS2_DATA3, SD_DATA3 , EMAC_RX_ER
10 IO15
GPIO15, ADC2_CH3, TOUCH3, MTDO, HSPICS0, RTC_GPIO13,
HS2_CMD, SD_CMD , EMAC_RXD3
11 IO2
GPIO2, ADC2_CH2, TOUCH2, RTC_GPIO12, HSPIWP,
HS2_DATA0, SDS_DATA0