processor and memory
● STMicro 32-bit microcontroller
● Speed: 120MHz, Cortex-M3
● Code Storage: 192 KB
● RAM: 60 KB
led colors
● power led: white
● user led: blue
button features
● functions as a reset button (default)
● can be used as GPIO input
digital i/o features
● all 22 digital and analog pins: GPIO
● digital pins 0-1: UART 1 RX, TX
● digital pins 2-3: UART 2 RX, TX/PWM
● digital pins 5-6: PWM, PWM
● digital pins 7-8: UART 3 RX, TX
(also works as UART 2 RTS, CTS)
● digital pins 9-10: PWM, PWM
● digital pins 11-13: PWM/MOSI, MISO, SPCK
● digital pin SD/SC: SDA/SCL
power
● input: 7.5 - 9.0 VDC or USB powered
● output: 5 VDC and 3.3 VDC regulated
● max current: 25 mA per pin
microcontroller max current: est. 125 mA total
● digital i/o are 3.3 V--but 5 V tolerant
environmental
● operating temperature: 0 - 70 °C (32 - 158 °F)
● RoHS compliant
● Pb-free (lead-free)