Pcb Layout Design; Standalone Esp32 Module; General Principles Of Pcb Layout - Espressif Systems ESP32 Hardware Design Manuallines

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2. SCHEMATIC CHECKLIST AND PCB LAYOUT DESIGN

2.2 PCB Layout Design

This chapter introduces the key points of designing ESP32 PCB layout with the example of ESP-WROOM-32D.

The PCB layout design guidelines are applicable to cases when the

• ESP32 module functions as a standalone device, and when the

• ESP32 functions as a slave device.

We recommend a four-layer PCB design.

• The first layer is the TOP layer for signal traces and components.

• The second layer is the GND layer without signal traces being routed so as to ensure a complete GND plane.

• The third layer is the POWER layer. It is acceptable to route signal traces on this layer, provided that there is

a complete GND plane under the RF and crystal oscillator.

• The fourth layer is the BOTTOM layer, where power traces are routed. Placing any components on this layer

is not recommended.

Below are the suggestions for a two-layer PCB design.

• The first layer is the TOP layer for signal traces and components.

Espressif Systems

Figure 10: ESP32 PCB Layout

ESP32 Hardware Design Guidelines V2.1

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