PIC18F4550 microcontroller pinout, applications & configuration
Microchip technology has introduced portable 8-bit, 16-bit and 32-bit microcontrollers called PIC18 nano-watt microcontrollers to perform a wide range of tasks. They are used in many applications and electronic industries due to their high performance and low power consumption. The PIC family of microcontrollers includes the PIC18FXXXX (Flash program memory), PIC18CXXXX (C-EEPROM program memory), and PIC18LFXXXX (Low voltage operation). This article describes a PIC microcontroller called the PIC18F4550 microcontroller with a circuit diagram and pin configuration.
What is a PIC18F4550 microcontroller?
The PIC18F4550 is an 8-bit microchip manufactured with nano-Watt technology with enhanced flash, USB and high performance. It is a 40-pin microcontroller that comes with many features such as memory tolerance, self-programmability, extended instruction set, enhanced CCP, addressable USART and 10-bit ADC (analog-to-digital converter).
PIC18F4550 microcontroller
Consists of 4 connected external timers or oscillators for time recording purposes, 13 channels for ADCs, ADC comparators, and other peripherals. It is a common 8-bit microcontroller available in different packages such as QPF, QPN and DIP. It is selected based on the type of project and requirements. The figure of the PIC18F4550 portable microcontroller chip is shown below.
The PIC18F4550 controller is very easy to program and easy to interface with multiple peripherals using 35 programmable I/O ports. Thanks to the USB interface feature, it provides a hassle-free connection between the console and the computer. The monitoring timer can be reset to use the systems without any human interface.
PIC18F4550 Pin Configuration / Pin Diagram:
The PIC18F4550 pin configuration/pin diagram is illustrated below.
Pin 1: (MCLR; VPP; RE3): This pin stands for Master Clear Input (RESET), Programming Voltage Input, and I/O Pin 3 of PORTE.
Pin 2: (RA0; AN0): This pin indicates PORTA time I/O Pin 0 from PORTA and analog input 0
Pin 3: (RA1; AN1): This pin indicates I/O Pin 1 of PORTA and Analog Input 1.
Pin 4: (RA2; VREF; CVREF; AN2): This pin indicates I/O Pin 2 of PORTA, reference voltage A/D input (low), analog comparator reference output, and analog input 2.
Pin 5: (RA3; AN3; VREF): This pin indicates I/O Pin 3 of PORTA, analog input 3, and reference voltage input A/D (high).
Pin 6: (RA4; T0CK1; C1OUT; RCV): This pin indicates I/O pin 4 of PORTA, Timer input 0 on the external clock, comparator output 1, and USB input of the external RCV transceiver.
Pin 7: (RA5; AN4; SS; HLVDIN; C2OUT): This pin indicates I/O pin 5 of PORTA, analog input 4, SPI Slave Select input, high/low voltage detection input, comparator output 2.
Pin 8: (RE0; AN5; CK1SPP): This pin indicates I/O PIN 0 from PORTE, analog input 5, and SPP clock output 1.
Pin 9: (RE1; AN6; CK2SPP): This pin indicates PORTE I/O PIN 1, analog input, and SPP clock output 2.
Pin 10: (RE2; AN7; OESPP): This pin indicates I/O PIN 2 of PORTE, Analog Input 7, and SPP Enable output.
Pin 11: (VDD): This pin indicates a 5V positive power supply.
Pin 12: (VSS): This pin points to ground (0V).
Pin 13: (OSC1; CLKI): This pin indicates oscillator pin 1 and the external clock source input.
Pin 14: (OSC2; CLKO; RA6): This pin indicates oscillator pin 2, which is the clock source output.
and PORTA I/O PIN 6.
Pin 15: (RC0; T1OSO; T13CKL): This pin points to PORT C I/O pin 0, Timer 0 oscillator output, and Timer 1/Timer 3 external clock input.
Pin 16: (RC1; T1OSL; CCP2; UOE): This pin indicates PORTC I/O PIN 1, Timer Input 1 Oscillator, Capture Input 2 or compares two PWM2 outputs/outputs and an OE output of the external USB transceiver.
Pin 17: (RC2; CCP1; P1A): This pin indicates PORTC I/O PIN 2, pickup I/O comparator 1/PWM1 output and CCP1 PWM enhancer output, channel A.
Pin 18: (VUSB): This pin indicates the 3.3V internal USB regulator voltage output.
Pin 19: (RD0; SPP0): This pin indicates PORT D I/O 0 and the parallel port data stream.
Pin 20: (RD1; SPP1): This pin indicates PORT D I/O PIN 1 and the parallel port data stream.
Pin 21: (RD2; SPP2): This pin indicates PORT D I/O PIN 2 and the parallel port data stream.
PIN 22: (RD3; SPP3): This pin indicates PORT D I/O PIN 3 and the parallel port data stream.
Pin 23: (RC4; D-;VM): This pin indicates PORT C I/O PIN 4, the USB differential minus line (input/output), and the VM input of the external USB transceiver.
Pin 24: (RC5;D+;VP): This pin indicates I/O PIN 5 of PORT C, a different USB (input/output) plus the line, and an external USB transceiver VP.
Pin 25: (RC6; TX, CK): This pin indicates I/O PIN 6 of PORT C, asynchronous EUSART transmission, and synchronous EUSART clock (RX/DT).
Pin 26: (RC7; RX; DT; SDO): This pin indicates I/O PIN 7 of PORT C, EUSART Asynchronous Receiving, Synchronous EUSART Data (TX/CK), SDO:
Features and Specifications:
The technical specifications of the PIC18F4550 microcontroller or the technical features are shown below.
Uses 8-bit CPU at 12 MIPS
Consists of 28 pins
Operating voltage ranges from +4.0V to +5.5V (where +5.5V is the absolute maximum voltage)
Contains 24 programmable I/O pins
Communication interface type: USB serial interface for console programming (pins 15 and 16); Master/Slave SPI Serial Interface is also for console programming (pins 7,18,21,22); Programmable serial UART for programming (pins 17, 18) and a two-wire serial interface used to connect peripheral devices such as LCD monitors and sensors (pins 21, 22).
It has an ADC module with 10 channels and 10-bit ADC resolution
Timer modules have 8-bit counters and three 16-bit counters
It has 2 representative comparisons
It has 2 PWM channels
External oscillator frequency up to 48MHz
The internal oscillator frequency is 32KHz to 8MHz (calibrated)
32KB program memory or flash memory size (10K write/erase cycles)
RAM size 2KB
EEPROM memory size 256 bytes
The watch timer is the programmable type with a separate oscillator on the chip
Energy saving modes are available
The operating temperature ranges from -40°C to +85°C (+85°C is absolute maximum temperature and -40°C is absolute minimum temperature).
The alternate PIC18F4550 microcontroller is the PIC18F2455 while the PIC18F4455 microcontroller is the alternate controller.
How to use the PIC18F4550 microcontroller/circuit diagram:
PIC18F4550 microcontrollers are used as simple microcontrollers but are not the same as digital integrated circuits. Therefore, to start working with this microcontroller, we have to save the required program file in the FLASH memory controller. Turn on the console to execute the code stored in flash memory. Thus, the response will be generated. Follow the steps to learn how to use the PIC18F4550 microcontroller for processing and programming.
PIC18F4550 Communicating with LED
The functions that will be performed by the PIC18F4550 microcontroller are listed.
Use the relative programming language to write functions in an IDE application (eg for windows OS MPLAB IDE).
Write functions in "C" language for this IDE.
Compile the appropriate program written using the IDE to eliminate errors.
After compiling the written program, a HEX file is generated by the IDE application.
Then select the programming device (ie, the PIC 3 group) to provide communication between the PIC18F4550 microcontroller and the PC.
Select the relevant programming device to run the dump program's HEX file.
Select the desired program file HEX.
Copy the program of the HEX file stored in the PIC18F4550 microcontroller flash memory using this program.
Required peripherals are connected to the microcontroller and operate the systems by disconnecting the software.
When the power is turned on, the HEX code stored in flash memory is executed by the controller and the specified task is performed.
The figure below shows the basic circuit diagram for connecting the LEDs to the PIC18F4550 microcontroller.
The components required to flash LEDs with a PIC18F4550 microcontroller or interface LEDs with a PIC18F4550 microcontroller are,
LEDs - 8
PIC18F4550 . microcontroller
12MHz crystal oscillator
capacitor
10K resistor
+5V power supply
converts
Connect the wires.
Connect the circuit as shown in the figure above and run the code required to connect the LEDs with the PIC18F4550 microcontroller below.
// configure bit
/* _CPUDIV_OSC1_PLL2_1L, // Divide the clock by 2
_FOSC_HS_1H, // high speed oscillator (HS) defined
_WDT_OFF_2H, // Turns off the monitoring timer
MCLRE_ON_3H // Turn ON the Master Clear
void master()
TRISB = 0x00; // PORTB is set to the output port
LATB = 0xFF, // Initially PORTB set to high (all LEDs on)
while (1)
LATB = ~ LATB; // switch the value of PORTB
delay_ms(1000); // 1 second delay
Where to use the PIC18F4550 microcontroller:
The applications of the PIC18F4550 microcontroller are listed below,
General projects for engineer and hobbyist
Engine control systems
Peripheral Connection Systems
Embedded systems such as vending machines, coffee makers, etc.
Analog signal processing and measurement systems
temperature control systems
developmental councils for learning
Please refer to this link to learn more about the PIC18F4550 microcontroller data sheet
Hence, this article discusses the definition of the PIC18F4550 microcontroller, pin configuration/pin diagram, technical specifications, circuit diagram/how to use, and applications of the PIC18F4550 microcontroller. This is a question for you, “What are the advantages of the PIC18F4550 microcontroller?”
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