Atmega32u4 supports usb port internally, so it is possible to connect the board directly to the computer and by the pre-loaded you may use Arduino IDE easily. Pololu - made these A-Star boards based on Atmege32u4 microcontroller.
Atmega32u4 supports internal 32 kB flash memory, 2.5 kB SRAM and inter lan usb interface. There is a micro usb connector on the board for computer connection but the kit does not include usb cable. Moreover, there are ISP pins, LEDs and a crystal oscillator on the board. The board is supplied by usb connector or an external 5.5 - 15 V voltage supply. There is an internal voltage regulator on the board, consequently, it is possible to supply the board with 5.5 - 15 V input voltage.
There are 26 I/O pins on A-Star 32u4 Micro, 15 of them are placed at sides. 3 of them are on the ISP socket. 7 of these pins can be configured as PWM out, 8 of them can be configered as analog input. This board is compatible to use on bread board. It occupies a place as 20-pin DIP IC.
User Guide contains detailed information about A-Star Mini LV and the other A-Star boards.
Note: The kit does not include Micro Usb cable.
Features:
- Sizes: 2.5 x 1.5 cm
- Programmable 16 Mhz Atmega3284 microcontroller
- 32 kB Flash memory (4 kB is used by bootloader)
- 2.5 kB SRAM
- 1 kB EEPROM
- Internal usb port
- Pre-loaded Arduino bootloader
- 18 digital I/O pins
- 7 pin as PWM
- 8 pin as Analog in
- User controlled 3 LEDs
- Reset button
- Usb or external supply
- Power protection for usb line
- Reverse voltage protection for external supply
- 6-pin ISP connentors (for external programming),
- Extensive User Guide
Vin pins are used for 5.5 V - 15 V input. Output current of the onboard regulator is 100 mA. There is also a 3.3 V regulator with 50 mA output current on the board too.
Pİn Mapping