Espressif Systems ESP32 Technical Reference Manual page 4

3.2.4.6 Clock Source Considerations
3.2.5 Wi-Fi BT Clock
3.2.6 RTC Clock
4 IO_MUX and GPIO Matrix
4.1 Introduction
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 Functional Description
4.6 Light-sleep Mode Pin Functions
4.7 Pad Hold Feature
4.8 I/O Pad Power Supply
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
4.13 Registers
5 LED_PWM
5.1 Introduction
5.2 Functional Description
5.2.1 Architecture
5.2.2 Timers
5.2.3 Channels
5.2.4 Interrupts
5.3 Register Summary
5.4 Registers
6 Remote Controller Peripheral
6.1 Introduction
6.2 Functional Description
6.2.1 RMT Architecture
6.2.2 RMT RAM
6.2.3 Clock
6.2.4 Transmitter
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