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ESP32-S3 Series
Espressif ESP32-S3 Series User Manual
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CONFIDENTIAL
ESP32S3
Series
Har
dwar
e
Design
Guidelines
Introduction
Hardwar
e
design
guidelines
give
advice
on
how
to
integrate
ESP32-S3
into
other
products.
ESP32-S3
is
a
series
of
high-performance
W
i-Fi
and
Bluetooth
®
5
(LE)
SoCs.
These
guidelines
will
help
to
ensur
e
optimal
performance
of
your
pr
oduct
with
respect
to
tech-
nical
accuracy
and
conformity
to
Espressif’
s
standards.
V
ersion
1.0
Espressif
Systems
Copyright
©
2021
www
.espressif.com
2
Table of Contents
Default Chapter
2
Table of Contents
2
1 Overview
5
2 Schematic Checklist
6
Power Supply
7
Digital Power Supply
7
Schematic for the Digital Power Supply Pins
7
Analog Power Supply
8
Schematic for the Analog Power Supply Pins
8
Power-On Sequence and System Reset
9
Power-On Sequence
9
System Reset
9
Power-Up and Reset Timing
9
Flash and SRAM
10
Sip Flash and Sip PSRAM
10
External Flash and External RAM
10
Clock Source
11
External Clock Source (Compulsory)
11
Schematic for the External Flash and RAM (PSRAM)
11
Schematic for the Crystal
11
RTC (Optional)
12
Schematic for the Oscillator
12
Schematic for the External Crystal (RTC)
12
Uart
13
Adc
13
Strapping Pins
13
JTAG Signal Source Selection
14
Strapping Pins
14
Usb
15
Parameter Descriptions of Setup and Hold Times for the Strapping Pin
15
Touch Sensor
16
3 PCB Layout Design
17
General Principles of PCB Layout
17
Positioning a Module on a Base Board
18
Power Supply
20
Crystal Oscillator
21
Flash and PSRAM
24
Uart
24
Usb
24
Touch Sensor
24
Electrode Pattern
25
PCB Layout
25
Electrode Pattern Requirements
25
Waterproof and Proximity Sensing Design
26
Typical Layout Problems and Solutions
27
Q: the Current Ripple Is Not Large, but the TX Performance of RF Is Rather Poor
27
Q: the Power Ripple Is Small, but RF TX Performance Is Poor
27
Q: When ESP32-S3 Sends Data Packages, the Power Value Is Much Higher or Lower than the Target Power Value, and the EVM Is Relatively Poor
28
Q: TX Performance Is Not Bad, but the RX Sensitivity Is Low
28
4
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Espressif ESP32-S3 Series Specifications
General
Brand
Espressif
Model
ESP32-S3 Series
Category
Microcontrollers
Language
English
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