Table Of Contents - Espressif ESP32­-S3 Series Hardware Design Manuallines

Contents
Contents
1 Overview
2 Schematic Checklist
2.1 Power Supply
2.1.1 Digital Power Supply
2.1.2 Analog Power Supply
2.2 Power-on Sequence and System Reset
2.2.1 Power-on Sequence
2.2.2 System Reset
2.2.3 Power-up and Reset Timing
2.3 Flash and SRAM
2.3.1 SiP Flash and SiP PSRAM
2.3.2 External Flash and External RAM
2.4 Clock Source
2.4.1 External Clock Source (compulsory)
2.4.2 RTC (optional)
2.5 RF
2.6 UART
2.7 ADC
2.8 Strapping Pins
2.9 USB
2.10 Touch Sensor
3 PCB Layout Design
3.1 General Principles of PCB Layout
3.2 Positioning a Module on a Base Board
3.3 Power Supply
3.4 Crystal Oscillator
3.5 RF
3.6 Flash and PSRAM
3.7 UART
3.8 USB
3.9 Touch Sensor
3.9.1 Electrode Pattern
3.9.2 PCB Layout
3.9.3 Waterproof and Proximity Sensing Design
3.10 Typical Layout Problems and Solutions
3.10.1 Q: The current ripple is not large, but the TX performance of RF is rather poor.
3.10.2 Q: The power ripple is small, but RF TX performance is poor.
3.10.3 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.
3.10.4 Q: TX performance is not bad, but the RX sensitivity is low.
Espressif Systems 2
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ESP32-S3 Series Hardware Design Guidelines v1.0
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