Arduino Micro specs & datasheets
The Leonardo’s ATmega32U4 with native USB on a 48 × 18 mm breadboard board, developed with Adafruit.
- Chip / SoC
- Microchip ATmega32U4
- CPU
- 8-bit AVR
- Clock
- 16 MHz
- RAM
- 2.5 KB SRAM
- Flash
- 32 KB (4 KB used by the bootloader)
- I/O voltage
- 5 V
- Released
- 2012
- Status
- In production
Draft entry: these specs were compiled from the linked sources and are waiting for a second check. Spotted a mistake? Use the form at the end of the page.
Specifications
- Chip / SoC
- Microchip ATmega32U4[1]
- CPU
- 8-bit AVR[2]
- Clock
- 16 MHz[1]
- RAM
- 2.5 KB SRAM[2]
- Flash
- 32 KB (4 KB used by the bootloader)[3]
- GPIO
- 20 digital I/O (7 PWM, 12 analog-capable)[1]
- I/O voltage
- 5 V[1]
- USB
- Micro-USB, native on the ATmega32U4[1]
- Upload limits
- 28 KB flash, 2.5 KB RAM[4]
Upload limits are what a sketch or firmware may use after the bootloader, as the build tools enforce them, not the chip’s full memory.
Can I still use it?
- Arduino framework
- Supported[1]Official Arduino core.
As published by each project, checked weekly. A platform not listed has no published information here, which is not the same as no support.
Datasheets and documents
Gotchas
- 5 V logic. I/O is 5 V. Sensors and modules that run at 3.3 V (most modern ones) need level shifting on their inputs.[1]
History and use today
History
Developed with Adafruit and released in 2012, the Micro is the Leonardo in a breadboard size.[1]
Still useful for
A favourite for custom keyboards and USB gadgets where an Uno-size board will not fit.
Sources
Spotted a mistake?
Every report is read by a person and checked against a source before anything changes. Please link one if you have it.