Datasheet

BITalino Mini Solo
Datasheet
PAGE 4 OF 5
ELECTRICAL CHARACTERISTICS
Minimum
Typical
Maximum
Power Supply
- VCC
1.8V
3.3V
5.5V
- DVCC
2.4V
3.3V
3.6V
Output Current
- VCC
200mA
- DVCC
100mA
- Analog Output (PWM)
40mA
Analog/Digital Converter
- Reference Voltage
1.0V
V
CC
- Input Voltage
GND
V
REF
- Internal Reference Voltage
1.0V
1.1V
1.2V
- Analog Input Impedance
100MΩ
NOTE: The BITalino Mini uses the integrated ADC in the ATMega328PB. It was designed to
be optimal reading signals from circuits with an output impedance not superior to 10kΩ. For
this reason, it is recommended that low output impedance circuits are used or that a buffer is
fitted to the circuit’s output.
COMMUNICATION
> BLE/UART: By default, the BITalino Mini uses the UART protocol to send information to the
onboard Bluetooth Low Energy module to communicate wirelessly with other devices, such
as a computer where live data acquisition can be done with its dedicated software
Opensignals
1
. However, as mentioned above, the BLE Module can be virtually detached from
the board to enable direct communication between the MCU and an external device using the
Tx and Rx pins of the board. Either way, the information outputted by the MCU is set by default
to the following parameters:
- 1 Start bit
- 8 Data bits
- No parity bit
- 1 Stop bit
- 115200 Baud rate (0.2% error due to Baud Rate approximation)
- Double Speed Mode
By programming the firmware of the BITalino it is still possible to set the UART communication
to any format resulting from a combination of the following characteristics:
- 1 start bit
- 5 to 9 data bits
- 1 optional parity bit (none, odd or even)
- 1 or 2 stop bits
- Single or Double speed mode
- Baud Rate up to 1.5Mbps
> SPI: The BITalino Mini presents header holes connected to MISO, MOSI, SCK and SS to
enable the SPI communication protocol present on the ATMega328PB. However, the firmware
loaded by default does not implement this functionality. This functionality can be enabled by
1
https://bitalino.com/downloads/software