Ai-Thinker Technology ESP32-A1S, Manual, Page: 9 / 18

ESP32-A1S SoC module
Page 9of 18
Copyright © 2020 Shenzhen Ai-Thinker Technology Co., Ltd All Rights Reserved
12 IO4
GPIO4,ADC2_CH0,TOUCH0, RTC_GPIO10, HSPIHD, HS2_DATA1,
SD_DATA1 , EMAC_TX_ER
13 HBIAS MIC2 control pin
14 MIC2N MIC2 input
15 MIC2P MIC2 input
16 MBIAS MIC1 control pin
17 MIC1P MIC1 input
18 MIC1N MIC1 input
19 GND Ground
20 GND Ground
21 LINEINR Headphone input
22 LINEINL Headphone input
23 SPORP Speaker right channel output
24 SPORN Speaker right channel output
25 SPOLP Speaker left channel output
26 SPOLN Speaker left channel output
27 HPOUTL Headphone output
28 HPOUTR Headphone output
29 IO5 GPIO5,VSPICS0,HS1_DATA6,EMAC_RX_CLK
30 IO18 GPIO18,VSPICLK,HS1_DATA7
31 IO23 GPIO23,VSPID,HS1_STROBE
32 IO19 GPIO19,VSPIQ,U0CTS,EMAC_TXD0
33 IO22 GPIO22,VSPIWP,U0RTS,EMAC_TXD1
34 IO21 GPIO21,VSPIHD,EMAC_TX_EN
35 EN Enable chip, active high
36 TXD0 GPIO1,U0TXD,CLK_OUT3,EMAC_RXD2
37 RXD0 GPIO3,U0RXD,CLK_OUT2
38 GND Ground