Espressif ESP32 Technical Reference Manual page 4

Contents
3.2.4.2
3.2.4.3
3.2.4.4
3.2.4.5
3.2.4.6
3.2.5 Wi-Fi BT Clock
3.2.6 RTC Clock
3.2.7 Audio PLL
3.3 Register Summary
3.4 Registers
4 IO_MUX and GPIO Matrix (GPIO, IO_MUX)
4.1 Overview
4.2 Peripheral Input via GPIO Matrix
4.2.1 Summary
4.2.2 Functional Description
4.2.3 Simple GPIO Input
4.3 Peripheral Output via GPIO Matrix
4.3.1 Summary
4.3.2 Functional Description
4.3.3 Simple GPIO Output
4.4 Direct I/O via IO_MUX
4.4.1 Summary
4.4.2 Functional Description
4.5 RTC IO_MUX for Low Power and Analog I/O
4.5.1 Summary
4.5.2 Analog Function Description
4.6 Light-sleep Mode Pin Functions
4.7 Pad Hold Feature
4.8 I/O Pad Power Supplies
4.8.1 VDD_SDIO Power Domain
4.9 Peripheral Signal List
4.10 IO_MUX Pad List
4.11 RTC_MUX Pin List
4.12 Register Summary
4.12.1 GPIO Matrix Register Summary
4.12.2 IO MUX Register Summary
4.12.3 RTC IO MUX Register Summary
4.13 Registers
4.13.1 GPIO Matrix Registers
4.13.2 IO MUX Registers
4.13.3 RTC IO MUX Registers
5 DPort Registers
5.1 Introduction
5.2 Features
Espressif Systems
REF_TICK
LEDC_SCLK Source
APLL_SCLK Source
PLL_F160M_CLK Source
Clock Source Considerations
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ESP32 TRM (Version 5.2)