Arduino Pro Mini

The Arduino Pro Mini is an ATmega168 based microcontroller board. The board comes with built-in arduino bootloader. It has 14 digital input/output pins (of which 6 can be used as PWM outputs), 8 analog inputs, an on-board resonator, a reset button, and holes for mounting pin headers. The board can be connected to the PC using USB port and the board can runs on USB power.

There are two version of the Pro Mini. One runs at 3.3V and 8 MHz, the other at 5V and 16 MHz.

Arduino Pro Mini

Arduino Pro Mini DETAILS
Microcontroller	ATmega168
Operating Voltage	3.3V or 5V
Input Voltage	3.35 -12 V (3.3V model) or 5 – 12 V (5V model)
Digital I/O Pins	14 (of which 6 provide PWM output)
Analog Input Pins	8
DC Current per I/O Pin	40 mA
Flash Memory	16 KB (of which 2 KB used by bootloader)
SRAM	1 KB
EEPROM	512 bytes
Clock Speed	8 MHz (3.3V model) or 16 MHz (5V model)

Arduino Pro Mini PINOUT
RAW	For supplying a raw (regulated) voltage to the board
VCC	The regulated 3.3 or 5 volt supply
GND	Ground pins
RX	Used to receive TTL serial data
TX	Used to transmit TTL serial data
2 and 3	Digital I/O pins. These pins can also be configured to trigger an interrupt on a low value, a rising or falling edge, or a change in value
3, 5, 6, 9, 10, and 11	Digital I/O pins. They can also be configured to provide 8-bit PWM output
10, 11, 12 and 13	Digital I/O pins. They can also be configured as SPI pins; 10 – (SS), 11 – (MOSI), 12 – (MISO) and 13 – (SCK)
A0 to A3	Analog input pins
A4 and A5.	Analog input pins. They can also be used as IIC pins; A4 – (SDA) and A5 – (SCL).
A6 and A7	Analog input pins
Reset	The microcontroller can be reset by bringing this pin low