These pins are connected to the TX-0 and RX-1 pins of the six pin header. Used to receive (RX) and transmit (TX) TTL serial data. In addition, some pins have specialized functions: Each pin can provide or receive a maximum of 40 mA and has an internal pull-up resistor (disconnected by default) of 20-50 kOhms. They operate at 3.3 or 5 volts (depending on the model). It has 1 KB of SRAM and 512 bytes of EEPROM (which can be read and written with the EEPROM library).Įach of the 14 digital pins on the Pro Mini can be used as an input or output, using pinMode(), digitalWrite(), and digitalRead() functions. The ATmega168 has 16 KB of flash memory for storing code (of which 2 KB is used for the bootloader). For supplying a raw (unregulated) voltage to the board. The Arduino Pro Mini can be powered with an FTDI cable or breakout board connected to its six pin header, or with a regulated 3.3V or 5V supply (depending on the model) on the Vcc pin or an unregulated supply on the RAW pin. Input Voltage: 3.35 -12 V (3.3V model) or 5 - 12 V (5V model)ĭigital I/O Pins: 14 (of which 6 provide PWM output)įlash Memory: 16 KB (of which 2 KB used by bootloader)Ĭlock Speed: 8 MHz (3.3V model) or 16 MHz (5V model) Operating Voltage: 3.3V or 5V (depending on model) Schematic: Arduino-Pro-Mini-schematic.pdf Summary One runs at 3.3V and 8 MHz, the other at 5V and 16 MHz.ĮAGLE files: arduino-pro-mini-reference-design.zip The pin layout is compatible with the Arduino Mini. The board comes without pre-mounted headers, allowing the use of various types of connectors or direct soldering of wires. The Arduino Pro Mini is intended for semi-permanent installation in objects or exhibitions. A six pin header can be connected to an FTDI cableto provide USB power and communication to the board. It has 14 digital input/output pins (of which 6 can be used as PWM outputs), 6 analog inputs, an on-board resonator, a reset button, and holes for mounting pin headers. The Arduino Pro Mini is a microcontroller board based on the ATmega168 ( datasheet).
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