Data Sheet

VMA100/VMA101/VMA102/VMA103
V. 01 – 28/11/2016 6 ©Velleman nv
VMA103
The VMA103 (Arduino
®
compatible Leonardo) is a microcontroller board based on the ATmega32u4. It has 20
digital input/output pins (of which 7 can be used as PWM outputs and 12 as analogue inputs), a 16 MHz
crystal oscillator, a micro USB connection, a power jack, an ICSP header, and a reset button. It contains
everything needed to support the microcontroller. Connect it to a computer with a USB cable or power it with
an AC-to-DC adapter or battery to get started.
1
USB interface
5
ICSP
2
reset button
6
7-12 VDC power input
3
digital I/O
7
power and ground pins
4
Atmel mega32U4
8
analogue input pins
microcontroller ................................................................................................ ATmega32u4
operating voltage ....................................................................................................... 5 VDC
input voltage (recommended) ................................................................................ 7-12 VDC
input voltage (limits) ............................................................................................. 6-20 VDC
digital I/O pins ............................................................................................................... 20
analogue input pins ......................................................................................................... 12
DC current per I/O pin ............................................................................................... 40 mA
DC current for 3.3 V pin ............................................................................................. 50 mA
flash memory ....................................... 32 kB (ATmega32u4) of which 4 kB used by bootloader
SRAM ............................................................................................... 2.5 kB (ATmega32u4)
EEPROM................................................................................................ 1 kB (ATmega32u4)
clock speed ............................................................................................................. 16 MHz
dimensions
length .............................................................................................................. 68.6 mm
width ............................................................................................................... 53.3 mm
weight ................................................................................................................... 20 g