Overview, Features, A-star comparison table – Pololu A-Star 32U4 User Manual
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1. Overview
The Pololu A-Star 32U4 family of products.
The Pololu A-Star 32U4 microcontroller boards are general-purpose programmable modules based on Atmel’s
ATmega32U4 AVR microcontroller, which has 32 KB of flash program memory, 2.5 KB of RAM, and built-
in USB functionality. Each A-Star (abbreviated A*) adds onboard components and connectors that support the
microcontroller and make it easier to use. The boards feature USB interfaces and ship with a preloaded Arduino-
compatible bootloader, and we provide a software add-on that enables them to be easily programmed from the
Arduino environment. The following sections of this user’s guide discuss each A-Star in more detail.
A
(not included) is required to connect an
A-Star 32U4 to a computer.
Features
• Programmable 16 MHz Atmel ATmega32U4 AVR microcontroller
◦ 32 KB flash (4 KB used by bootloader, leaving 28 KB available for user program by default)
◦ 2.5 KB SRAM
◦ 1 KB EEPROM
◦ Native full-speed USB (12 Mbps)
• Preloaded with Arduino-compatible bootloader
• Can be powered from USB or external source regulated to 5 V by onboard regulator
• Reverse-voltage protection on external power input
• 6-pin ISP header for use with an
A-Star comparison table
Pololu A-Star 32U4 User’s Guide
© 2001–2014 Pololu Corporation
1. Overview
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