PIC18 Microcontroller: What It Is and How to Use it

What Is PIC18F452 Microcontrontollers?

In truth, Programmable Interface Controllers (PIC) are small but powerful microcontrollers that you can program to carry out various tasks. 

Plus, you can find these microcontrollers in electronic devices like

• Control systems
• Phones
• Alarm systems
• Computers, etc.

Electronic Devices

All microcontrollers in the PIC family have registers that work as RAM. They also come with a stack that saves return addresses.

Furthermore, the PIC18F452 is a flash-based 8-bit microcontroller with MIPS and CMPS. It also features up to thirty-four I/O pins from forty pins and can dish out a lot of power. 

Indeed, the PIC18F452 microcontroller has 8-bit and 16-bit timers (3), a 10-bit digital-analog converter with up to 8 channels, and an SPI, 12C, and USART peripheral.

Plus, it doesn’t require a lot of power as it only uses a maximum of 0.2uA standby current. Also, it consumes nothing more than a 1.6mA standard current when operating on 5v OF 4 Mhz.  

Types of PIC Microcontrollers

There are four types of PIC microcontrollers based on their internal architecture. So these four types include 

• Baseline PIC
• Enhanced mid-range PIC
• Mid-range PIC
• PIC18

We’ll be focusing on PIC18 for this article.

PIC18F452 Pin Configuration

The PIC18F452 microcontroller has 40 pins, each with its own unique feature. Plus, we’ll list all the pins and their functions here for you. 

The images above show the various pin configurations for the PIC18 microcontroller.

Alternatives for The P1C18F452

Detailed Features of PIC18F452

Specifically, let’s shed more light on the PIC18F452 microcontroller’s features:

• 34 I/O pins and 8-bit CPU
• An 8-bit timer with Three 10-bit timers
• Pin count: 40
• One 10-bit 8-channel ADC module
• 2v minimum operating voltage and 5.5v maximum operating voltage
• No comparators  and DAC modules are available
• It has an external Oscillator with no internal oscillator
• Three communication peripherals, including UART, SPI, and  I2C
•  32kb of program memory and 256-byte of Data EEPROM
• 10 MIPS of CPU speed, 1536 byte RAM bytes, and 8-bit Architecture
• PPS (Peripheral Pin Select) and operational amplifier are not available
• No ADC with computation and internal voltage reference
• DAC converter and max DAC resolution not present
• Zero cross detect and signal measurement timer missing
• Two PWM outputs
• No hardware limit timer and USB modules
• WWDT (Windowed Watchdog Timer) and angular timer absent
• The PIC can’t handle high voltages
• -40^oC minimum and 125^oC maximum operating temperature

Programming PIC Microcontrollers

Indeed, there is a variety of software you can use to program PIC microcontrollers. You can even utilize assembly language to program the PIC.

You’ll need more than one software to program this controller fully. Plus, an IDE is where you do the primary programming occurs. Other things you need include a compiler and an IPE. 

The best part is that you can get free software on the internet to handle the programming.

You’ll need a PICkit3 device to upload your code into the PIC. But that’s not all. You’ll also need some hardware like:

• Breadboard

Breadboard

• Crystal oscillators

• PIC ICS 
• Capacitors

Capacitors

• Soldering stations

And more.

Applications

You can use the 8-bit PIC for applications like:

• Analog data processing
• Integrating Sensor
• Output-input operations
• Small-scale and low-cost applications
• Real-time control applications
• Data logging
• Development tools

Difference Between the PIC16 and the PIC18

The first notable difference is the PIC18 boasts more speed than the PIC16 and can reach operating speeds of 48Mhz. Also, PIC18 features hardware division, and PIC16 doesn’t. 

There’s also the case of bank switching, where PIC18 makes it more stress-free than PIC16.

Final Thoughts

PIC18 microcontrollers have designs that allow them to handle simple control applications. In the past, the PIC represented the Peripheral Interface Controller. But today, the PIC stands for Programmable Intelligent Computer. 

Today, the PIC microcontroller has become an intelligent device with data RAM. Plus, it has enough space for storing any program you want. In other words, the PIC18 microcontrollers aren’t only combinations of memory, processors, and peripherals.

So, we’d like to hear from you. Do you have questions concerning this topic?

Please don’t hesitate to contact us, and we’ll be pleased to be of assistance.