Microcontrollers
The following is a rough guide, the reality is considerably more complicated.
| Class | Manufacturer | Architecture | Clock | Wikipedia | Notes |
|---|---|---|---|---|---|
| AVR | Microchip (was Atmel) | 8-bit AVR | 1.6 to 32 MHz | AVR microcontrollers | ATmega328, ATtiny |
| PIC | Microchip | 8-bit to 32-bit PIC | 0 to 200 MHz | PIC microcontrollers | |
| STM32 | ST Micro | 32-bit ARM Cortex-M0+ | 0 to 48 MHz | STM32 | compatible: APM32 by Geehy Semiconductor |
| SAM | Microchip (was Atmel) | 32-bit ARM Cortex-M0+ | 0 to 48 MHz | Atmel ARM-based processors | e.g. ATSAMD21G18 |
| RP2040 | Raspberry Pi | 32-bit ARM Cortex-M0+ | 0 to 48 MHz | RP2040 | Raspberry Pi Pico |
| ESP32 | Espressif Systems | 32-bit Xtensa LX6 / RISC-V | 160 or 240 MHz | ESP32 | replaces ESP8266; integrated Wi-Fi and dual-mode Bluetooth |
| MSP430 | Texas Instruments | 16-bit MSP430 | 0 to 25 MHz | TI MSP430 | TI range |
| nRF | Nordic Semiconductor | 32-bit ARM Cortex | 16 to 70 MHz | Nordic Semiconductor | e.g. nRF51, nRF52, nRF53, nRF91 |
Resources
Boards
Arduino
| Arduino Board | Wikipedia (Board) | Arduino Docs | Processor | Wikipedia (Processor) | Speed | EEPROM | SRAM |
|---|---|---|---|---|---|---|---|
| Arduino Nano | Arduino Nano | Nano | ATmega328 | ATmega328 | 16MHz | 512bytes | 2kB |
| Arduino Uno | Arduino Uno | UNO R3 | ATmega328P | ATmega328 | 16MHz | 512bytes | 2kB |
| Arduino Leonardo | Arduino | Leonardo | ATmega32U4 | AVR microcontrollers | 16MHz | 1kB | 2.5kB |
| Arduino Mega | Arduino | Mega 2560 Rev3 | ATmega2560 | AVR microcontrollers | 16MHz | 4kB | 8kB |