Description
Arduino Pro mini:
| Microcontroller | ATmega328 * |
| Board Power Supply | 5 – 12 V (5V model) |
| Circuit Operating Voltage | 5V |
| Digital I/O Pins | 14 |
| PWM Pins | 6 |
| UART | 1 |
| SPI | 1 |
| I2C | 1 |
| Analog Input Pins | 6 |
| External Interrupts | 2 |
| DC Current per I/O Pin | 40 mA |
| Flash Memory | 32KB of which 2 KB used by bootloader * |
| SRAM | 2 KB * |
| EEPROM | 1 KB * |
| Clock Speed | 16 MHz |
The Arduino Pro Mini is a microcontroller board based on the ATmega328.
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. A six pin header can be connected to an FTDI cable or Sparkfun breakout board to provide USB power and communication to the board.The Arduino Pro Mini is intended for semi-permanent installation in objects or exhibitions. The board comes without pre-mounted headers, allowing the use of various types of connectors or direct soldering of wires. The pin layout is compatible with the Arduino Mini.
There are two version of the Pro Mini. One runs at 3.3V and 8 MHz, the other at 5V and 16 MHz.
The Arduino Pro Mini was designed and is manufactured by SparkFun Electronics.
Power
It 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. There is a voltage regulator on board so it can accept voltage up to 12VDC. If you’re supplying unregulated power to the board, be sure to connect to the “RAW” pin on not VCC.
The power pins are as follows:
RAW For supplying a raw voltage to the board.
VCC The regulated 3.3 or 5 volt supply.
GND Ground pins.
Memory
The ATmega328 has 32 kB of flash memory for storing code (of which 0.5kB is used for the bootloader). It has 2 kB of SRAM and 1kBs of EEPROM (which can be read and written with the EEPROM library.
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