![]() ![]() It is a nonvolatile memory which means the data stored in the EEPROM will stay there even if the power is lost. This memory can be utilized for storing data over time by the microcontroller. The Atmega328p Chip comes with 1KB of Electrically Erasable read-only memory. This is nonvolatile memory which means when power is lost the code (program) that we have flashed remains there and the program will again start executing when the power is restored. Features of Atmega328p Microcontroller:Ītmega328 has 32KB of flash memory and it is used to store the program on the board. However, you can also use it as a digital input or output Pin. This LED will blink when Arduino Uno is connected to an SPI programmer (Like UBSASP). There is a built-in LED connected to the SPI serial clock (SCLK, Pin 13) of Arduino pro mini. This actually provides you the flexibility to solder only those pins that are required for your project making your circuit more compact. When you buy this board there will be no connectors soldered to the board. Therefore you will have to program it using an external USB to TTL programmer. No USB Port:Īrduino Pro Mini Doesn’t come with a USB port and there no onboard programmer on this chip. More info on oscillators will be discussed in the upcoming tutorials. Majority of the Arduino Pro Mini boards uses ceramic oscillator however, I have also seen Arduino Pro mini boards with a crystal oscillator. The 3.3 volts version of the Arduino pro mini board has an 8MHz onboard oscillator whereas, the 5-volt version has a 16MHz oscillator. Voltage Regulator provides you the flexibility to power your Arduino Pro Mini boards using 5 to 12 volts unregulated voltage source. 8 Analog Pins Description Arduino Pro Mini On board Voltage Regulator:Īrduino Pro Mini has either 3.3 volts voltage regulator or 5 volts voltage regulator. Additionally, the first 6 Analog pins can be used as interrupts. Furthermore, the Analog input Pin A4 and A5 can also be utilized for the I2C communication protocol. The SMD Atmel328p chip on this board has 8 channel ADC which can be used for interfacing 8 different analog sensors at the same time. Functions associated with Digital Pins of Arduino Pro Mini 8 Analog Pins: Furthermore, Pin 2 and Pin 3 have hardware dedicated interrupt capability however you can use any of the 14 digital I/) pins as interrupts that we will discuss in the future tutorials. Two timers T0 and T1 are associated with digital I/O Pin 4 and Pin 5 of the board. Pin 0 and 1 can also be used for serial communication using the UART protocol. You can also find it in the table given below. These pins are clearly marked in the Pin Description Figure that we checked above. There are 14 digital I/O on this board and out of these 14 Pins 6 can be used for PWM output. Complete Pinout (Pin diagram of Arduino Pro Mini Board) Atmega328p Features of Arduino Pro Mini Boardįollowing are the features of Arduino pro mini board: 14 digital I/O pins: The complete description for each color is provided in the table on the right. Note the light green represents the associated pin number on the chip. The complete, detailed, and cross-verified Pin Diagram of Arduino Pro Mini Board is given in the Figure below. Can I apply 5Volts on a 3.3 volt Arduino Pro Mini board?.How to identify if my Arduino boards support 5 volts or 3.3 volts.Difference between 5 Volts and 3.3 Volts Arduino Pro Mini boards.You can checkout the following topics for more information on arduino voltage Regulator. The 5V version of Arduino Pro mini has 5 Volts regulator and 16MHz crystal oscillator clock on the board whereas the 3.3 Volts version of Arduino pro mini has 3.3 volts voltage regulator with an 8MHz onboard crystal oscillator. 5V board with 16MHz onboard crystal oscillator.3.3 board with 8MHz onboard crystal oscillator.There are two very popular versions of arduino pro mini boards they include The small size and low prices for this borad are the main factors making it more attractive when compare to the bulky and costly Arduino Uno board. The capability of this microcontroller board is equal to Arduino Uno because it contains the same Atmega328p microcontroller chip. Arduino Pro Mini is a small microcontroller board that uses the popular AVR Atmel Atmega328p microcontroller chip just like its other variants popular variants like Arduino UNO and Arduino Nano. ![]()
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