Espressif ESP32 Technical Reference Manual page 732

Glossary
Glossary
Abbreviations for Peripherals
AES
AHB
APB
DMA
DPORT
eFuse
EMAC
I2C
I2S
LEDC
MCPWM
MMU
MPU
PCNT
PERI
PID
PMU
RMT
RNG
RSA
RTC
SDMMC
SHA
SPI
TIMG
UART
ULP Coprocessor
WDT
Abbreviations for Registers
ISO
NMI
REG
R/W
Espressif Systems
AES Accelerator
Advanced High-performance Bus. For more information, please refer to its
specification.
Advanced Peripheral Bus.
specification.
DMA Controller
Short for Data Port. The full name is Xtensa Local Memory Interface (XLMI)
Port.
eFuse Controller
Ethernet MAC
I2C Controller
I2S Controller
LED_PWM Controller
Motor Control PWM
Memory Management Unit
Memory Protection Unit
Pulse Count Controller
Peripheral
Process Identifier
Power Management Unit
Remote Control Peripheral
Random Number Generator
RSA Accelerator
Real Time Controller. A group of circuits in SoC that keeps working in any chip
mode and at any time.
SD/MMC Host Controller
SHA Accelerator
SPI Controller
Timer Group
UART Controller
Ultra-low-power Coprocessor
Watchdog Timers
Isolation. When a module is power down, its output pins will be stuck in un-
known state (some middle voltage). "ISO" registers will control to isolate its
output pins to be a determined value, so it will not affect the status of other
working modules which are not power down.
Non-maskable interrupt.
Register.
Read/write. Software can read and write to these bits.
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For more information, please refer to its
732 ESP32 TRM (Version 5.2)