adafruit learning system ItsyBitsy 32u4 Manual page 4

The ItsyBitsy 32u4 uses the Atmega32u4 chip, which is the same core chip in the Arduino Leonardo as well as the
same chip we use in our Feather 32u4. The 5V 16 MHz It runs at the same speed and voltage of an Arduino UNO or
Leonardo. The 3V 8 MHz version is the same speed and voltage as a Feather 32u4. So you'll be happy to hear that
not only is Itsy Bitsy programmable using the Arduino IDE as you already set up, but a vast number of Arduino projects
will work out of the box!
We recommend this as an upgrade from the
work with all computers, USB serial debugging, and a more reliable bootloader.
backpack with this board to add recharge-able battery.
Here's some handy specifications:
ATmega32u4 onboad chip in QFN package
USB bootloader with a nice LED indicator, AVR109 compatible (same as Flora, Feather 32u4, Leonardo, etc)
Micro-USB jack for power, USB uploading and debugging, you can put it in a box or tape it up and use any Micro
USB cable for when you want to reprogram.
Can act as a USB HID Keyboard, Mouse, MIDI or plain USB 'CDC' serial device (default)
Power with either USB or external output (such as a battery) into VBAT pin - it'll automatically switch over
On-board red pin #13 LED
23 GPIO total - 6 analog in, 1x SPI port, 1x I2C port, 1x Hardware Serial port and 10 more GPIO, 4 of which have
PWM
Can drive NeoPixels, connect to sensors, servos, etc.
Reset button for entering the bootloader or restarting the program.
For the 5V version:
5V power and logic, 16MHz clock rate, 2KB RAM and 28K FLASH
On-board 5.0V power regulator with 150mA output capability and ultra-low dropout. Up to 16V input, reverse-
© Adafruit Industries
Pro Trinkets (https://adafru.it/dUf)
(https://adafru.it/e0w)
https://learn.adafruit.com/introducting-itsy-bitsy-32u4
because this has native USB so it will
You can even use the Pro Trinket LiPo
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