Ebyte ESP32-S3-MINI-1 User manual

ESP32-S3-MINI-1 & ESP32-S3-MINI-1U
User Manual

Contents
ESP32-S3-MINI-1 & ESP32-S3-MINI-1U ..................................................................................................................................... 1
User Manual .............................................................................................................................................................................................1
Disclaimer and Copyright Notice .......................................................................................................................................................4
Chapter 1 Overview ............................................................................................................................................................................5
1.1 Introduction ..............................................................................................................................................................................5
1.2 Features ..................................................................................................................................................................................5
Chapter 2 Electrical characteristics ................................................................................................................................................ 6
2.1 absolute maximum ratings ................................................................................................................................................6
2.2 Recommended working conditions................................................................................................................................6
2.3 DC electrical characteristics（3.3V，25℃）............................................................................................................6
2.4 Power consumption characteristics ................................................................................................................................ 7
2.4.1 RF power consumption in Active mode ...........................................................................................................7
2.5 Wi-Fi radio frequency........................................................................................................................................................... 7
2.5.1 Wi-Fi RF standards................................................................................................................................................... 7
2.5.2 Wi-Fi RF Transmitter (TX) Specifications ......................................................................................................8
2.5.3 Wi-Fi Radio Receiver (RX) Specifications..................................................................................................... 9
2.6 Bluetooth low energy radio frequency ........................................................................................................................11
2.6.1 Bluetooth Low Energy RF Transmitter (TX) Specifications ....................................................................11
2.6.2 Bluetooth Low Energy RF Receiver (RX) Specifications ........................................................................ 13
Chapter 3 Hardware description ................................................................................................................................................... 16
3.1 Functional block diagram ...............................................................................................................................................16
3.2 Mechanical dimensions and pin definitions...............................................................................................................17
3.2 Module schematic diagram ............................................................................................................................................19
3.2.1 ESP32-S3-MINI-1 Module schematic diagram .............................................................................................. 19
3.2.2 ESP32-S3-MINI-1U Module schematic diagram ...........................................................................................20
3.3 Module dimensions..........................................................................................................................................................21
3.3.1 ESP32-S3-MINI-1 Dimensions...........................................................................................................................21
3.3.1 ESP32-S3-MINI-1U Dimensions....................................................................................................................... 22
3.4 PCB package graphics ........................................................................................................................................................ 23
3.4.1 ESP32-S3-MINI-1 PCB package graphics .......................................................................................................23
3.4.2 ESP32-S3-MINI-1U PCB package graphics ................................................................................................... 24
3.5 External antenna connector dimensions ..................................................................................................................... 25
Chapter 4 FAQ...................................................................................................................................................................................26
4.1 Transmission distance is not ideal ................................................................................................................................... 26
4.2 Module is easily damaged..................................................................................................................................................26
4.3 BER(Bit Error Rate) is high ..............................................................................................................................................26
Chatper 5 Welding Operation Guidance..................................................................................................................................... 27
5.1 Reflow soldering temperature....................................................................................................................................... 27
5.2 Reflow soldering curve ...................................................................................................................................................28
Chapter 6 Packing.............................................................................................................................................................................29
6.1 ESP32-S3-MINI-1 packing ............................................................................................................................................... 29
6.2 ESP32-S3-MINI-1U packing ............................................................................................................................................30

Chengdu Ebyte Electronic Technology Co.,Ltd. ESP32-S3-MINI series user manual
Copyright ©2012–2023， Chengdu Ebyte Electronic Technology Co.,Ltd. ~3~
Chapter 7 Disclaimer ....................................................................................................................................................................... 31
Revision History ...................................................................................................................................................................................31
About us..................................................................................................................................................................................................31

Chengdu Ebyte Electronic Technology Co.,Ltd. ESP32-S3-MINI series user manual
Copyright ©2012–2023， Chengdu Ebyte Electronic Technology Co.,Ltd. ~4~
Disclaimer and Copyright Notice
The information in this document, including the URL address for reference, is subject to change
without notice. The document is provided "as is" without any guarantee responsibility, including any
guarantee for marketability, suitability for a specific purpose, or non-infringement, and any guarantee
for any proposal, specification or sample mentioned elsewhere. This document does not bear any
responsibility, including the responsibility for infringement of any patent rights caused by the use of
the information in this document. This document does not grant any license for the use of intellectual
property rights in estoppel or other ways, whether express or implied.
The test data obtained in the article are all obtained by the Ebyte laboratory, and the actual
results may vary slightly.
We hereby declared that all brand names, trademarks and registered trademarks mentioned in
this document are the property of their respective owners.
The final interpretation right belongs to Chengdu Ebyte Electronic Technology Co., Ltd.
Notice :
Due to product version upgrades or other reasons, the contents of this manual may be changed. Ebyte Electronic
Technology Co., Ltd. reserves the right to modify the contents of this manual without any hint or noticet. This
manual is only used as a guide. Chengdu Ebyte Electronic Technology Co., Ltd. makes every effort to provide
accurate information in this manual. However, we does not guarantee that the contents of the manual are
completely free of errors. All statements, information and suggestions in this manual do not constitute any express
or implied guarantee.

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Chapter 1 Overview
1.1 Introduction
ESP32-S3-MINI-1 and ESP32-S3-MINI-1U are two general-purpose Wi-Fi + BLE modules, equipped with Espressif ESP32-S3
chip. In addition to rich peripheral interfaces, the module also has powerful neural network computing capabilities and signal
processing capabilities. It is suitable for a variety of application scenarios in the AIoT field, such as wake word detection and voice
command recognition, face detection and recognition, smart Home, smart appliances, smart control panels, smart speakers, etc.
ESP32-S3-MINI-1 uses PCB on-board antenna, and ESP32-S3-MINI-1U uses IPEX antenna. Wi-Fi and Bluetooth coexist and
share the same antenna.
ESP32-S3-MINI-1 ESP32-S3-MINI-1U
1.2 Features
Built-in ESP32-S3 series chip, equipped with Xtensa® dual-core 32-bit LX7 microprocessor (supports single-precision floating
point operation unit);
Support clock frequency up to 240 MHz;
With 8 MB flash;
Support 2.4 GHz Wi-Fi (802.11 b/g/n) + Bluetooth® 5 (LE);
With rich peripheral interfaces, such as GPIO, SPI, LCD, Camera interface, UART, I2C, I2S, etc.;
Operating temperature can be between –40 ~ 85 °C;
The communication distance can reach 200 meters under ideal conditions；

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Chapter 2 Electrical characteristics
2.1 absolute maximum ratings
Symbol
Parameter
Min.value
Max.value
Unit
VDD33
Power pin voltage
–0.3
3.6
V
TSTORE
storage temperature
–40
85
°C
2.2 Recommended working conditions
Symbol
Parameter
Min.value
Typical
value
Max.value
Unit
VDD33
Power pin voltage
3.0
3.3
3.6
V
IVDD
Current supply from external power
supply
0.5
—
—
A
T
Recommended operating temperature
–40
—
85
°C
Humidity
Humidity
—
85
—
%RH
2.3 DC electrical characteristics（3.3V，25℃）
Symbol
Parameter
Min.value
Typical
value
Max.value
Unit
CIN
Pin capacitance
—
2
—
pF
VIH
High level input voltage
0.75×VDD1
—
VDD1+ 0.3
V
VIL
low level input voltage
–0.3
—
0.25×VDD1
V
IIH
High level input current
—
—
50
nA
IIL
Low level input current
—
—
50
nA
VOH 2
High level output voltage
0.8×VDD1
—
—
V
VOL 2
Low level output voltage
—
—
0.1×VDD1
V
IOH
High level source current (VDD1=
3.3V,VOH>= 2.64V,PAD_DRIVER=3)
—
40
—
mA
IOL
Low level sink current (VDD1=3.3 V,VOL=
0.495 V, PAD_DRIVER=3)
—
28
—
mA

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RP U
Internal weak pull-up resistor
—
45
—
kΩ
RP D
Internal weak pull-down resistor
—
45
—
kΩ
VIH_nRST
Chip reset release voltage (EN pin should
meet the voltage range)
0.75×VDD1
—
VDD1+0.3
V
VIL_nRST
Chip reset voltage (EN pin should meet the
voltage range)
–0.3
—
0.25×VDD1
V
1VDD is the power supply for I/O.
2VOH and VOL are measured values when the load is high resistance.
2.4 Power consumption characteristics
2.4.1 RF power consumption in Active mode
Working Mode
Description
Peak (mA)
Active (RF work)
TX
802 . 11b, 1 Mbps, @20 .5 dBm
355
802 . 11g, 54 Mbps, @18 dBm
297
802 . 11n, HT20, MCS7, @17 .5 dBm
286
802 . 11n, HT40, MCS7, @17 dBm
285
RX
802 . 11b/g/n, HT20
95
802 . 11n, HT40
97
1. The above power consumption data is based on the test results completed at the RF interface with a 3.3 V power supply and an
ambient temperature of 25 °C. All emission data are measured based on 100% duty cycle.
2. When measuring RX power consumption data, the peripherals are turned off and the CPU is idle.
2.5 Wi-Fi radio frequency
2.5.1 Wi-Fi RF standards
Name
Description
Working channel center frequency range 1
2412 ~ 2484 MHz

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Wi-Fi protocol
IEEE 802 . 11b/g/n
Data rate
20 MHz
11b: 1, 2, 5 .5, 11 Mbps
11g: 6, 9, 12, 18, 24, 36, 48, 54 Mbps
11n: MCS0-7, 72 .2 Mbps (Max)
40 MHz
11n: MCS0-7, 150 Mbps (Max)
Antenna type
PCB Antenna, external antenna connector 2
1The central frequency range of the working channel shall comply with national or regional norms and standards.
The software can configure the center frequency range of the working channel.
2The output impedance of the module with an external antenna connector is 50Ω, and the module without an external
antenna connector does not need to pay attention to the output impedance.
2.5.2 Wi-Fi RF Transmitter (TX) Specifications
Depending on product or certification requirements, you can configure the transmitter target power. For details about default
power, see Table 1 “spectrum template and transmit power when EVM complies with 802.11 standard.”
Rate
Min.
value
(dBm)
Typical
value
(dBm)
Max.
value
(dBm)
802 . 11b, 1 Mbps
—
20.5
—
802 . 11b, 11 Mbps
—
20.5
—
802 . 11g, 6 Mbps
—
20.0
—
802 . 11g, 54 Mbps
—
18.0
—
802 . 11n, HT20, MCS 0
—
19.0
—
802 . 11n, HT20, MCS 7
—
17.5
—
802 . 11n, HT40, MCS 0
—
18.5
—
802 . 11n, HT40, MCS 7
—
17.0
—
Table 1 spectrum template and transmit power when EVM complies with 802.11 standard
Rate
Min.
value
(dB)
Typical
value
(dB)
Standard
limits
(dB)
802 . 11b, 1 Mbps, @20 .5 dBm
—
–24.5
– 10
802 . 11b, 11 Mbps, @20 .5 dBm
—
–24.5
– 10
802 . 11g, 6 Mbps, @20 dBm
—
–23.0
–5

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802 . 11g, 54 Mbps, @18 dBm
—
–29.5
–25
802 . 11n, HT20, MCS 0, @19 dBm
—
–24.0
–5
802 . 11n, HT20, MCS 7, @17 .5 dBm
—
–30.5
–27
802 . 11n, HT40, MCS 0, @18 .5 dBm
—
–25.0
–5
802.11n, HT40, MCS 7, @17 dBm
—
–30.5
–27
Table 2 Launch EVM test
2.5.3 Wi-Fi Radio Receiver (RX) Specifications
Rate
Min.
value
(dBm)
Typical
value
(dBm)
Max.
value
(dBm)
802 . 11b, 1 Mbps
—
–98.2
—
802 . 11b, 2 Mbps
—
–95.6
—
802 . 11b, 5 .5 Mbps
—
–92.8
—
802 . 11b, 11 Mbps
—
–88.5
—
802 . 11g, 6 Mbps
—
–93.0
—
802 . 11g, 9 Mbps
—
–92.0
—
802 . 11g, 12 Mbps
—
–90.8
—
802 . 11g, 18 Mbps
—
–88.5
—
802 . 11g, 24 Mbps
—
–85.5
—
802 . 11g, 36 Mbps
—
–82.2
—
802 . 11g, 48 Mbps
—
–78.0
—
802 . 11g, 54 Mbps
—
–76.2
—
802 . 11n, HT20, MCS 0
—
–93.0
—
802 . 11n, HT20, MCS 1
—
–90.6
—
802 . 11n, HT20, MCS 2
—
–88.4
—
802 . 11n, HT20, MCS 3
—
–84.8
—
802 . 11n, HT20, MCS 4
—
–81.6
—
802 . 11n, HT20, MCS 5
—
–77.4
—
802 . 11n, HT20, MCS 6
—
–75.6
—
802 . 11n, HT20, MCS 7
—
–74.2
—
802 . 11n, HT40, MCS 0
—
–90.0
—
802 . 11n, HT40, MCS 1
—
–87.5
—
802 . 11n, HT40, MCS 2
—
–85.0
—

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802 . 11n, HT40, MCS 3
—
–82.0
—
802 . 11n, HT40, MCS 4
—
–78.5
—
802 . 11n, HT40, MCS 5
—
–74.4
—
802 . 11n, HT40, MCS 6
—
–72.5
—
802 . 11n, HT40, MCS 7
—
–71.2
—
Table 3 Receiving sensitivity
Rate
Min.
value
(dBm)
Typical
value
(dBm)
Max.
value
(dBm)
802 . 11b, 1 Mbps
—
5
—
802 . 11b, 11 Mbps
—
5
—
802 . 11g, 6 Mbps
—
5
—
802 . 11g, 54 Mbps
—
0
—
802 . 11n, HT20, MCS 0
—
5
—
802 . 11n, HT20, MCS 7
—
0
—
802 . 11n, HT40, MCS 0
—
5
—
802 . 11n, HT40, MCS 7
—
0
—
Table 4 Maximum receiving level
Rate
Min.
value
(dB)
Typical
value
(dB)
Standard
limits
(dB)
802 . 11b, 1 Mbps
—
35
—
802 . 11b, 11 Mbps
—
35
—
802 . 11g, 6 Mbps
—
31
—
802 . 11g, 54 Mbps
—
14
—
802 . 11n, HT20, MCS 0
—
31
—
802 . 11n, HT20, MCS 7
—
13
—
802 . 11n, HT40, MCS 0
—
19
—
802 . 11n, HT40, MCS 7
—
8
—
Table 5 Receive adjacent channel suppression

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2.6 Bluetooth low energy radio frequency
Parameter
Min.
Value
(MHz)
Typical
value
(MHz)
Max.
value
(MHz)
Working channel center frequency
2402
—
2480
Table 6 Bluetooth Low Energy Frequency
2.6.1 Bluetooth Low Energy RF Transmitter (TX) Specifications
Parameter
Description
Min.
Value
Typical
value
Max. value
Unit
RF transmit power
RF power control range
–24.00
0
20.00
dBm
Gain control step size
—
3.00
—
dB
Carrier frequency offset
and drift
|fn |n=0 , 1 , 2 , . .k Max. value
—
2.50
—
kHz
|f0 − fn | Max. value
—
2.00
—
kHz
|fn − fn −5 | Max. value
—
1.40
—
kHz
|f1 − f0 |
—
1.00
—
kHz
Modulation characteristics
∆ f 1avg
—
249.00
—
kHz
∆ f2max Min. Value
(at least 99 .9% of ∆ f2max )
—
198.00
—
kHz
∆ f2avg/∆ f 1avg
—
0.86
—
—
In-band spurious
emissions
± 2 MHz offset
—
–37.00
—
dBm
± 3 MHz offset
—
–42.00
—
dBm
> ± 3 MHz offset
—
–44.00
—
dBm
Table 7 Transmitter Characteristics - Bluetooth Low Energy 1 Mbps
Parameter
Description
Min.
Value
Typical
value
Max. value
Unit
RF transmit power
RF power control range
–24.00
0
20.00
dBm
Gain control step size
—
3.00
—
dB
Carrier frequency offset
and drift
|fn |n=0 , 1 , 2 , . .k Max. value
—
2.50
—
kHz
|f0 − fn | Max. value
—
2.00
—
kHz
|fn − fn −5 | Max. value
—
1.40
—
kHz
|f1 − f0 |
—
1.00
—
kHz

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Table 8 Transmitter Characteristics - Bluetooth Low Energy 2 Mbps
Parameter
Description
Min.
Value
Typical
value
Max. value
Unit
RF transmit power
RF power control range
–24.00
0
20.00
dBm
Gain control step size
—
3.00
—
dB
Carrier frequency offset
and drift
|fn |n=0 , 1 , 2 , . .k Max. value
—
0.80
—
kHz
|f0 − fn | Max. value
—
1.00
—
kHz
|fn − fn −3 |
—
0.30
—
kHz
|f0 − f3 |
—
1.00
—
kHz
Modulation characteristics
∆ f 1avg
—
248.00
—
kHz
∆ f 1max Min. Value
(at least 99 .9% of ∆ f 1max )
—
222.00
—
kHz
In-band spurious
emissions
± 2 MHz offset
—
–37.00
—
dBm
± 3 MHz offset
—
–42.00
—
dBm
> ± 3 MHz offset
—
–44.00
—
dBm
Table 9 Transmitter Characteristics - Bluetooth Low Energy 125 Kbps
Parameter
Description
Min.
Value
Typical
value
Max. value
Unit
RF transmit power
RF power control range
–24.00
0
20.00
dBm
Gain control step size
—
3.00
—
dB
Carrier frequency offset
and drift
|fn |n=0 , 1 , 2 , . .k Max. value
—
0.80
—
kHz
|f0 − fn | Max. value
—
1.00
—
kHz
|fn − fn −3 |
—
0.85
—
kHz
|f0 − f3 |
—
0.34
—
kHz
Modulation characteristics
∆ f2avg
—
213.00
—
kHz
∆ f2max Min. Value
(at least 99 .9% of ∆ f2max )
—
196.00
—
kHz
Modulation characteristics
∆ f 1avg
—
499.00
—
kHz
∆ f2max Min. Value
(at least 99 .9% of ∆ f2max )
—
416.00
—
kHz
∆ f2avg/∆ f 1avg
—
0.89
—
—
In-band spurious
emissions
± 4 MHz offset
—
–42.00
—
dBm
± 5 MHz offset
—
–44.00
—
dBm
> ± 5 MHz offset
—
–47.00
—
dBm

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In-band spurious
emissions
± 2 MHz offset
—
–37.00
—
dBm
± 3 MHz offset
—
–42.00
—
dBm
> ± 3 MHz offset
—
–44.00
—
dBm
Table 10 Transmitter Characteristics - Bluetooth Low Energy 500 Kbps
2.6.2 Bluetooth Low Energy RF Receiver (RX) Specifications
Parameter
Description
Min.
Value
Typical
value
Max.
value
Unit
Sensitivity @30 .8% PER
—
—
–96.5
—
dBm
Maximum received signal @30 .8% PER
—
—
8
—
dBm
Common channel rejection ratio C/I
F = F0 MHz
—
8
—
dB
Adjacent channel selective inhibition ratio
C/I
F = F0 + 1 MHz
—
4
—
dB
F = F0 – 1 MHz
—
4
—
dB
F = F0 + 2 MHz
—
–23
—
dB
F = F0 – 2 MHz
—
–23
—
dB
F = F0 + 3 MHz
—
–34
—
dB
F = F0 – 3 MHz
—
–34
—
dB
F > F0 + 3 MHz
—
–36
—
dB
F > F0 – 3 MHz
—
–37
—
dB
Mirror frequency
—
—
–36
—
dB
Adjacent channel mirror frequency
interference
F = Fimage + 1 MHz
—
–39
—
dB
F = Fimage – 1 MHz
—
–34
—
dB
out-of-band blocking
30 MHz ~ 2000 MHz
—
– 12
—
dBm
2003 MHz ~ 2399 MHz
—
– 18
—
dBm
2484 MHz ~ 2997 MHz
—
– 16
—
dBm
3000 MHz ~ 12 .75 GHz
—
– 10
—
dBm
Intermodulation
—
—
–29
—
dBm
Table 11 Receiver Characteristics - Bluetooth Low Energy 1 Mbps
Parameter
Description
Min.
Value
Typical
value
Max.
value
Unit
Sensitivity @30 .8% PER
—
—
–92
—
dBm

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Maximum received signal @30 .8% PER
—
—
3
—
dBm
Common channel rejection ratio C/I
F = F0 MHz
—
8
—
dB
Adjacent channel selective inhibition ratio
C/I
F = F0 + 2 MHz
—
4
—
dB
F = F0 – 2 MHz
—
4
—
dB
F = F0 + 4 MHz
—
–27
—
dB
F = F0 – 4 MHz
—
–27
—
dB
F = F0 + 6 MHz
—
–38
—
dB
F = F0 – 6 MHz
—
–38
—
dB
F > F0 + 6 MHz
—
–41
—
dB
F > F0 – 6 MHz
—
–41
—
dB
Mirror frequency
—
—
–27
—
dB
Adjacent channel mirror frequency
interference
F = Fimage + 2 MHz
—
–38
—
dB
F = Fimage – 2 MHz
—
4
—
dB
out-of-band blocking
30 MHz ~ 2000 MHz
—
– 15
—
dBm
2003 MHz ~ 2399 MHz
—
–21
—
dBm
2484 MHz ~ 2997 MHz
—
–21
—
dBm
3000 MHz ~ 12 .75 GHz
—
–9
—
dBm
Intermodulation
—
—
–29
—
dBm
Table 12 Receiver Characteristics - Bluetooth Low Energy 2 Mbps
Parameter
Description
Min.
Value
Typical
value
Max.
value
Unit
Sensitivity @30 .8% PER
—
—
– 103.5
—
dBm
Maximum received signal @30 .8% PER
—
—
8
—
dBm
Common channel rejection ratio C/I
F = F0 MHz
—
4
—
dB
Adjacent channel selective inhibition ratio
C/I
F = F0 + 1 MHz
—
1
—
dB
F = F0 – 1 MHz
—
2
—
dB
F = F0 + 2 MHz
—
–26
—
dB
F = F0 – 2 MHz
—
–26
—
dB
F = F0 + 3 MHz
—
–36
—
dB
F = F0 – 3 MHz
—
–39
—
dB
F > F0 + 3 MHz
—
–42
—
dB
F > F0 – 3 MHz
—
–43
—
dB
Mirror frequency
—
—
–42
—
dB

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Adjacent channel mirror frequency
interference
F = Fimage + 1 MHz
—
–43
—
dB
F = Fimage – 1 MHz
—
–36
—
dB
Table 12 Receiver Characteristics - Bluetooth Low Energy 125 Kbps
Table 14 Receiver Characteristics - Bluetooth Low Energy 500 Kbps
Parameter
Description
Min.
Value
Typical
value
Max.
value
Unit
Sensitivity @30 .8% PER
—
—
– 100
—
dBm
Maximum received signal @30 .8% PER
—
—
8
—
dBm
Common channel rejection ratio C/I
F = F0 MHz
—
4
—
dB
Adjacent channel selective inhibition ratio
C/I
F = F0 + 1 MHz
—
1
—
dB
F = F0 – 1 MHz
—
0
—
dB
F = F0 + 2 MHz
—
–24
—
dB
F = F0 – 2 MHz
—
–24
—
dB
F = F0 + 3 MHz
—
–37
—
dB
F = F0 – 3 MHz
—
–39
—
dB
F > F0 + 3 MHz
—
–38
—
dB
F > F0 – 3 MHz
—
–42
—
dB
Mirror frequency
—
—
–38
—
dB
Adjacent channel mirror frequency
interference
F = Fimage + 1 MHz
—
–42
—
dB
F = Fimage – 1 MHz
—
–37
—
dB

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Chapter 3 Hardware description
3.1 Functional block diagram
Figure 1 ESP32-S3-MINI-1 functional block diagram
Figure 2 ESP32-S3-MINI-1U functional block diagram

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3.2 Mechanical dimensions and pin definitions
The pin layout diagram shows the approximate location of the pins on the module. Please refer to Figure 3.3
Module Dimensions for the actual layout drawn to scale.
ESP32-S3-MINI-1U has no Keepout Zone, and the pin layout is the same as that of ESP32-S3-MINI-1.
Chart 3-1 Pin layout diagram
Pin definition:
Name
Serial
Number
Typea
Function
GND
1, 2, 42,
43, 46-65
P
gounding
3V3
3
P
Powered by
IO0
4
I/O/T
RTC_GPIO0, GPIO0
IO1
5
I/O/T
RTC_GPIO1, GPIO1, TOUCH1, ADC1_CH0
IO2
6
I/O/T
RTC_GPIO2, GPIO2, TOUCH2, ADC1_CH1

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IO3
7
I/O/T
RTC_GPIO3, GPIO3, TOUCH3, ADC1_CH2
IO4
8
I/O/T
RTC_GPIO4, GPIO4, TOUCH4, ADC1_CH3
IO5
9
I/O/T
RTC_GPIO5, GPIO5, TOUCH5, ADC1_CH4
IO6
10
I/O/T
RTC_GPIO6, GPIO6, TOUCH6, ADC1_CH5
IO7
11
I/O/T
RTC_GPIO7, GPIO7, TOUCH7, ADC1_CH6
IO8
12
I/O/T
RTC_GPIO8, GPIO8, TOUCH8, ADC1_CH7, SUBSPICS1
IO9
13
I/O/T
RTC_GPIO9, GPIO9, TOUCH9, ADC1_CH8, FSPIHD, SUBSPIHD
IO10
14
I/O/T
RTC_GPIO10, GPIO10, TOUCH10, ADC1_CH9, FSPICS0,
FSPIIO4,SUBSPICS0
IO11
15
I/O/T
RTC_GPIO11, GPIO11, TOUCH11, ADC2_CH0, FSPID, FSPIIO5,SUBSPID
IO12
16
I/O/T
RTC_GPIO12, GPIO12, TOUCH12, ADC2_CH1, FSPICLK,
FSPIIO6,SUBSPICLK
IO13
17
I/O/T
RTC_GPIO13, GPIO13, TOUCH13, ADC2_CH2, FSPIQ, FSPIIO7,SUBSPIQ
IO14
18
I/O/T
RTC_GPIO14, GPIO14, TOUCH14, ADC2_CH3, FSPIWP,
FSPIDQS,SUBSPIWP
IO15
19
I/O/T
RTC_GPIO15, GPIO15, U0RTS, ADC2_CH4, XTAL_32K_P
IO16
20
I/O/T
RTC_GPIO16, GPIO16, U0CTS, ADC2_CH5, XTAL_32K_N
IO17
21
I/O/T
RTC_GPIO17, GPIO17, U1TXD, ADC2_CH6
IO18
22
I/O/T
RTC_GPIO18, GPIO18, U1RXD, ADC2_CH7, CLK_OUT3
IO19
23
I/O/T
RTC_GPIO19, GPIO19, U1RTS, ADC2_CH8, CLK_OUT2, USB_D-
IO20
24
I/O/T
RTC_GPIO20, GPIO20, U1CTS, ADC2_CH9, CLK_OUT1, USB_D+
IO21
25
I/O/T
RTC_GPIO21, GPIO21
IO26
26
I/O/T
SPICS1, GPIO26
IO47
27
I/O/T
SPICLK_P_DIFF, GPIO47, SUBSPICLK_P_DIFF
IO33
28
I/O/T
SPIIO4, GPIO33, FSPIHD, SUBSPIHD
IO34
29
I/O/T
SPIIO5, GPIO34, FSPICS0, SUBSPICS0
IO48
30
I/O/T
SPICLK_N_DIFF, GPIO48, SUBSPICLK_N_DIFF
IO35
31
I/O/T
SPIIO6, GPIO35, FSPID, SUBSPID
IO36
32
I/O/T
SPIIO7, GPIO36, FSPICLK, SUBSPICLK
IO37
33
I/O/T
SPIDQS, GPIO37, FSPIQ, SUBSPIQ
IO38
34
I/O/T
GPIO38, FSPIWP, SUBSPIWP
IO39
35
I/O/T
MTCK, GPIO39, CLK_OUT3, SUBSPICS1
IO40
36
I/O/T
MTDO, GPIO40, CLK_OUT2
IO41
37
I/O/T
MTDI, GPIO41, CLK_OUT1
IO42
38
I/O/T
MTMS, GPIO42

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aP：power supply；I：input；O：output；T：Can be set to high impedance. Bold font is the default function of the
pin. The default function of pins 28 ∼29, and pins 31 ∼33 is determined by the eFuse bit.
3.2 Module schematic diagram
3.2.1 ESP32-S3-MINI-1 Module schematic diagram
Chart 3-2 Schematic
TXD0
39
I/O/T
U0TXD, GPIO43, CLK_OUT1
RXD0
40
I/O/T
U0RXD, GPIO44, CLK_OUT2
IO45
41
I/O/T
GPIO45
IO46
42
I/O/T
GPIO46
EN
43
I
High level: chip enable;
Low level: the chip is turned off;
Be careful not to let the EN pin float.

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3.2.2 ESP32-S3-MINI-1U Module schematic diagram
Chart 3-3 Schematic