ESP32-P4-WIFI6 Development Board Schematic and Component Details

Introduction

This document provides a detailed schematic representation of the Waveshare ESP32-P4-WIFI6 development board. It outlines the various components, their interconnections, and the functionality of different modules, including the core ESP32-P4 microcontroller, power management, connectivity interfaces, and multimedia components.

Board Layout Overview

The development board features several key connectors and components for versatile interfacing and functionality:

Connectors: USB (Type-C, Debug), MicroSD Card slot, 22-PIN connector, DSI connector, CSI connector, Speaker output, Microphone input.
Buttons: RESET, BOOT, Key1, Key2.
Indicators: PWR (Power), VBUS, VSYS, EN, 3V3, RUN.
Main Module: The ESP32-P4-WIFI6 module is centrally located.
Display/Camera Interfaces: Dedicated connectors for DSI and CSI interfaces.
Audio: MIC input and Speaker output are clearly marked.
Power Input: USB port for power and data.

ESP32-P4-WIFI6 Microcontroller Module

This section details the core ESP32-P4 microcontroller and its associated components.

Main Chip: ESP32-P4 (various pinouts detailed across schematics)
Flash Memory: GD25Q256EYIGR (256Mbit / 32MB SPI Flash)
Crystal Oscillator: XTAL_P, XTAL_N (likely 40MHz for main clock, 32.768KHz for RTC)
Power Pins: ESP_3V3, ESP_VDD_HP, VDD_FLASH, VDD_MIPI, VDD_FLASH, VDD_HP_0 through VDD_HP_599 (representing various power domains and supply lines).
Debug Interface: USB_DBG_D_P, USB_DBG_D_N for debugging.
GPIO Pins: A comprehensive set of General Purpose Input/Output pins are available, including IO0-IO23, IO117-IO119, IO120-IO127, IO130-IO135, IO140-IO153, IO160-IO169, IO170-IO179, IO180-IO189, IO190-IO199, IO200-IO209, IO210-IO219, IO220-IO229, IO230-IO239, IO240-IO249, IO250-IO259, IO260-IO269, IO270-IO279, IO280-IO289, IO290-IO299, IO300-IO309, IO310-IO319, IO320-IO329, IO330-IO339, IO340-IO349, IO350-IO359, IO360-IO369, IO370-IO379, IO380-IO389, IO390-IO399, IO400-IO409, IO410-IO419, IO420-IO429, IO430-IO439, IO440-IO449, IO450-IO459, IO460-IO469, IO470-IO479, IO480-IO489, IO490-IO499, IO500-IO509, IO510-IO519, IO520-IO529, IO530-IO539, IO540-IO549, IO550-IO559, IO560-IO569, IO570-IO579, IO580-IO589, IO590-IO599, GPIO0-GPIO54, GPIO7, GPIO8, GPIO13, GPIO12, GPIO11, GPIO10, GPIO9, GPIO53, GPIO34, GPIO35, GPIO36, GPIO37, GPIO38, GPIO39, GPIO40, GPIO41, GPIO42, GPIO43, GPIO44, GPIO45, GPIO46, GPIO47, GPIO48, GPIO49, GPIO50, GPIO51, GPIO52.
Boot/Reset: BOOT, RESET pins for boot mode selection and system reset.
Key Buttons: Key1, Key2 for user input.
LEDs: PWR, VBUS, VSYS, EN, 3V3, RUN indicators.

Power Management

The power management circuitry ensures stable voltage regulation for the board's components.

Input Power: VBUS (from USB), USB0_5V.
Voltage Regulators: MP1658GTF-Z (DC-DC converter), MP1605GTF-Z (DC-DC converter), RT9193-33PB (3.3V LDO), and other LDOs for various voltage rails (e.g., ESP_LDO_VO1, VO2, VO3, VO4).
Output Voltages: VCC_5V, ESP_3V3, ESP_VDD_HP, 1.2V, ESP_LDO_VO1, VO2, VO3, VO4.
Filtering: Numerous capacitors (e.g., 10uF, 1uF, 100nF, 22pF) and inductors (e.g., 4.7uH, 1uH) are used for filtering and stability.
Power Indicators: LEDs for PWR, VBUS, VSYS, EN, 3V3, RUN.

Connectivity Interfaces

The board offers multiple interfaces for data transfer and peripheral connection.

USB to UART Converter

Facilitates serial communication over USB.

Chip: CH343P
Connections: USB D+/D-, UART TXD/RXD, RTS, CTS, DTR, DCD.

MicroSD Card Interface

Supports MicroSD card storage.

Connector: TF1
Signals: CMD, VDD, CLK, VSS, D0, D1, D2, D3, CD/CD2.

MIPI DSI Interface

High-speed serial interface for displays.

Signals: DSI_CLK_P/N, DSI_D1_P/N, DSI_D0_P/N, DSI_REXT.
Connector: DSI (24-pin)

MIPI CSI Interface

High-speed serial interface for cameras.

Signals: CSI_CLK_P/N, CSI_D1_P/N, CSI_D0_P/N, CSI_REXT.
Connector: CSI (24-pin)

22-PIN Interface

A general-purpose 22-pin connector providing access to various GPIOs and system signals.

Signals: Includes GPIOs, I2C (SDA/SCL), SPI, UART, DSI, CSI, and power lines (VBUS, VSYS, GND, 3V3).
Connector: 22PIN-P15

USB Ports

Main USB: USB Type-C connector (PIU1401-P5, P1) for power and data (USBD_N, USBD_P).
Debug USB: USB_DBG_D_P, USB_DBG_D_N for debugging.

Audio and Multimedia

Components for audio processing and output.

Audio Codec

Handles analog-to-digital and digital-to-analog audio conversion.

Chip: Identified by connections like Codec_CE, MIC_P, MIC_N, PA_INL+/-, PA_OUTL+/-, Speaker outputs. Specific chip model not clearly OCR'd but connections suggest a standard audio codec.
Signals: SCLK, MCLK, LRCK, DSDI, SDATA, ADCVREF, DACVREF, PVDD, DVDD, AGND, AVDD, OUTP/OUTN.

PA & Speaker & Mic

Audio amplifier and microphone interface.

Audio Amplifier (PA): NS4150B chip, with inputs PA_INL+/-, outputs PA_OUTL+/-, and connections to speaker terminals.
Microphone Input: MIC_P, MIC_N terminals for connecting a microphone.
Speaker Output: PA_OUTL+/-, connected to speaker terminals.

Other Components and Interfaces

Miscellaneous components and interfaces on the board.

Interface Connector: A general-purpose interface connector (PIU1001-PIU1018) providing access to various GPIOs (GP00-GP15, GP20-GP33, GP34-GP54).
MicroSD Card Slot: Labeled as MicroSD Card, connected to the ESP32-P4.
Buttons: RESET, BOOT, Key1, Key2.
LED Indicators: PWR, VBUS, VSYS, EN, 3V3, RUN.
External Connectors: Labeled as 'Interface', 'DSI', 'CSI', '22PIN-P15'.
Power Input: USB connector for power and data.

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