Ai-Thinker Technology ESP32-A1S Manual Download Page 15

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ESP32-A1S SoC module

5.2 Antenna layout requirements

(1) For the installation position on the motherboard, the following two methods are recommended:

Solution 1: Put the module on the edge of the main board, and the antenna area extends out of the

edge of the main board.

Solution 2: Put the module on the edge of the motherboard, and hollow out an area at the antenna

position on the edge of the motherboard.

(2)In order to meet the performance of the on-board antenna, it is forbidden to place metal parts

around the antenna.

5.3 Power supply

(1) Recommended 3.3V voltage, peak current above 500mA

(2) It is recommended to use LDO for power supply; if using DC-DC, it is

recommended that the ripple be controlled within 30mV.

(3) The DC-DC power supply circuit is recommended to reserve the position of the

dynamic response capacitor, which can optimize the output ripple when the load

changes greatly.

(4) It is recommended to add ESD devices to the 3.3V power interface.

Summary of Contents for ESP32-A1S

Page 2: ...r laboratory and the actual results may be slightly different The Wi Fi alliance membership mark is owned by the WiFi alliance All trade mark names trademarks and registered trademarks mentioned herei...

Page 3: ...Technology Co Ltd All Rights Reserved CONTENT 1 Product overview 5 2 Pin function 8 3 Function description 10 4 Electrical parameters 12 5 Design guidance 14 6 Module internal chip connection table 16...

Page 4: ...ument development revision revocation resume Vision Data Revised content Edition Approve V1 0 2017 11 05 First Edition Junx V1 1 2020 06 09 Update Yiji Xie V1 2 2020 08 04 Update silk screen Xu V1 3 2...

Page 5: ...plications suitable for home smart devices smart audio story machine solutions etc It is an ideal solution for IoT applications Internal circuit of ESP32 A1S module is highly integrated It supports a...

Page 6: ...e which is convenient for welding and testing Built in CodeC audio decoder chip can support music playback and recording Support multiple sleep modes the minimum deep sleep current can reach 6 5uA Sup...

Page 7: ...00 4608000 bps default 115200bps Bluetooth Bluetooth 4 2 BR EDR and stander BLE support A2DP AVRC etc Wi Fi 802 11 b g n e i support DLNA On chip sensors Hall sensor Temperature sensor Capacitive touc...

Page 8: ...mended 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_GPIO1...

Page 9: ...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 Headpho...

Page 10: ...ion and chip ID External Flash and SRAM ESP32 supports up to four 16 MBytes external QSPI Flash and static random access memory SRAM and has a hardware encryption function based on AES to protect deve...

Page 11: ...aking if the frequency of the crystal oscillator is 26 MHz the capacitance values of C1 and C2 are within 10 pF if the frequency of the crystal oscillator is 40 MHz the capacitance values of C1 and C2...

Page 12: ...ended working conditions Working environment Name Min Typical value Max Unit Operating temperature 40 20 85 Supply voltage VDD 3 0 3 3 3 6 V Digital port characteristics Port Name Min Typical value Ma...

Page 13: ...F F0 2 MHz 35 dB F F0 3 MHz 25 dB F F0 3 MHz 45 dB Out of band blocking performance 30MHz 2000MHz 10 dBm 2000MHz 2400MHz 27 dBm 2500MHz 3000MHz 27 dBm 3000MHz 12 5GHz 10 dBm Intermodulation performanc...

Page 15: ...ow out an area at the antenna position on the edge of the motherboard 2 In order to meet the performance of the on board antenna it is forbidden to place metal parts around the antenna 5 3 Power suppl...

Page 16: ...al IO ports please refer to the instructions in the specification This will affect the startup configuration of the module 3 The IO port of the module is 3 3V If the main control and the IO level of t...

Page 18: ...act us Official website https www ai thinker com Development DOCS https docs ai thinker com Official Forum http bbs ai thinker com Sample purchase https ai thinker en alibaba com Business cooperation...