PIC18F452 8-bit PIC Microcontroller

26 August 2020 - 0 Comments

PIC18F452 PIC Microcontroller

PIC18F452 Pinout

PIC18F452 is an 8-bit with 10 MIPS, CMPS, FLASH-based microcontroller that has 34 I/O pins out of 40 Pin packages. It is a powerful microcontroller with one 8-bit and three 16-bit timers, 8-Channels 10-bit Analog-digital converter, and I2C, SPI, USART peripheral. It is a Low power microcontroller unit that consumes about less than 0.2 uA standby current and 1.6mA normal current during 5V and 4 Mhz operations.

PIC18F452 Pin Configuration

Pin Number	Pin Name	Description
1	MCLR/VPP	Master Clear (input) or High voltage ICSP programming enable pin mainly used for programming purposes.
2	RA0/AN0	Bidirectional I/O pin of Port A bit 0 or Analog input 0
3	RA1/AN1	Bidirectional I/O pin of Port A bit 1 or Analog input 1
4	RA2/AN2/VREF-	Bidirectional I/O pin of Port A bit 2 or Analog input 2 or A/D Reference (Low) Voltage.
5	RA3/AN3/VREF+	Bidirectional I/O pin of Port A bit 3 or Analog input 3 or A/D Reference (High) Voltage.
6	RA4/T0CKI	Bidirectional I/O pin of Port A bit 4 or Timer 0 external clock input.
7	RA5/AN4/SS/LVDIN	Bidirectional I/O pin of Port A bit 5 or Analog input 4 or SPI Slave Select input or Low voltage Detect input.
8	RE0/RD/AN5	Bidirectional I/O pin of Port E bit 0 or Read control for parallel slave port or Analog input 5
9	RE1/WR/AN6	Bidirectional I/O pin of Port E bit 1 or Write control for parallel slave port or Analog input 6
10	RE2/CS/AN7	Bidirectional I/O pin of Port E bit 2 or Chip select control for parallel slave port or Analog input 7.
11	VSS	Positive supply pin.
12	VDD	Ground supply pin.
13	OSC1/CLKI	Oscillator Crystal or External clock input.
14	OSC2/CLKO/RA6	Bidirectional I/O pin of Port A bit 6 or Oscillator crystal or clock output.
15	RC0/T1OSO/T1CKI	Bidirectional I/O pin of Port C bit 0 or Timer 1 Oscillator output or Timer 1/Timer 3 external clock input.
16	RC1/T1OSI/CCP2	Bidirectional I/O pin of Port C bit 1 or Timer 1 Oscillator input or Capture 2 input, Capture 2 output, PWM 2 output.
17	RC2/CCP1	Bidirectional I/O pin of Port C bit 2 or Capture 1 input, Capture1 output, PWM1 output
18	RC3/SCK/SCL	Bidirectional I/O pin of Port C bit 3 or Synchronous serial clock input/output for SPI mode or Synchronous serial clock input/output for 12C mode.
19	RD0/PSP0	Bidirectional I/O pin of Port D bit 0 or Parallel slave Port Data
20	RD1/PSP1	Bidirectional I/O pin of Port D bit 1 or Parallel slave Port Data.
21	RD2/PSP2	Bidirectional I/O pin of Port D bit 2 or Parallel slave Port Data
22	RD3/PSP3	Bidirectional I/O pin of Port D bit 3 or Parallel slave Port Data
23	RC4/SDI/SDA	Bidirectional I/O pin of Port C bit 4 or SPI Data In or 12C data I/O.
24	RC5/SDO	Bidirectional I/O pin of Port C bit 5 or SPI Data Out.
25	RC6/TX/CK	Bidirectional I/O pin of Port C bit 6 or USART Asynchronous Transmit or USART Synchronous Clock
26	RC7/RX/DT	Bidirectional I/O pin of Port C bit 7 or USART Asynchronous Receive or USART Synchronous Data
27	RD4/PSP4	Bidirectional I/O pin of Port D bit 4 or Parallel slave Port Data
28	RD5/PSP5	Bidirectional I/O pin of Port D bit 5 or Parallel slave Port Data
29	RD6/PSP6	Bidirectional I/O pin of Port D bit 6 or Parallel slave Port Data
30	RD7/PSP7	Bidirectional I/O pin of Port D bit 7 or Parallel slave Port Data
31	VSS	Ground Supply pin
32	VDD	Positive supply pin
33	RB0/INT0	Bidirectional I/O pin of Port B bit 0 or External Interrupt 0.
34	RB1/INT1	Bidirectional I/O pin of Port B bit 1 or External Interrupt 1.
35	RB2/INT2	Bidirectional I/O pin of Port B bit 2 or External Interrupt 2.
36	RB3/CCP2	Bidirectional I/O pin of Port B bit 3 or Capture 2 input, Compare 2 output, PWM 2 output.
37	RB4	Bidirectional I/O pin of Port B bit 4 with IOC (Interrupt-on-change)
38	RB5/PGN	Bidirectional I/O pin of Port B bit 5 with IOC (Interrupt-on-change) or Low Voltage ICSP programming enable pin
39	RB6/PG	Bidirectional I/O pin of Port B bit 6 with IOC (Interrupt-on-change) or In-Circuit Debugger and ICSP programming clock pin.
40	RB7/PGD	Bidirectional I/O pin of Port B bit 7 with IOC (Interrupt-on-change) or In-Circuit Debugger and ICSP programming data pin.

Features and Specification of the PIC18F452 Microcontroller

PIC18F452 - Simplified Features and Specification
CPU	8-bit
Number of Pins	40
Operating Voltage (V)	2-5.5 V
Number of I/O pins	34
ADC Module	1 (8-Channels, 10-bits)
Timer Module	8-bit(1), 16-bit(3)
Comparators	0
DAC Module	0
Communication Peripherals	SPI, I2C, UART
External Oscillator	Yes
Internal Oscillator	No
Program Memory (KB)	32KB
CPU Speed (MIPS)	10
RAM Bytes	1536 byte
Data EEPROM	256 byte

Note: Complete technical details can be found in the 18F452 Datasheet linked at the bottom of this page.

Alternative product of PIC18F452

Alternative products for PIC18F452 microcontroller are listed below-

PIC12F629
PIC12F683
PIC16F505
PIC12F508
PIC16F676
PIC16F72
PIC16F873A
PIC16F876A
PIC16F886
PIC16F252

Introduction to PIC18F452

PIC18F452 also has the feature of Programming code protection, Power-on Reset (POR), Power-up Timer (PWRT), Oscillator Start-up timer with power saving sleep mode. The watchdog timer features its own On-Chip RC Oscillator for reliable operations. 2V to 5.5V operating voltage makes the 18F452 suitable for 3.3V and 5.0V logic level operations. Below image is showing the pin diagram of PIC18F452-

PIC18F452 Pin Diagram

Detailed Features of PIC18F452

PIC18F452 –Detailed Features
CPU	8-bit
Architecture	8-bit
Program Memory Size (Kbytes)	32 KB
RAM (bytes)	1536 bytes
EEPROM/HEF	256 byte
Pin Count	40
Max. CPU Speed (MHz)	40MHz
Peripheral Pin Select (PPS)	No
Internal Oscillator	No
No. Of comparators	Nil
No. Of Operational Amplifier	Nil
No. Of ADC channels	8
Max ADC Resolution (bits)	10-bits
ADC with Computation	No
Number of DAC Converter	Nil
Max DAC resolution	-
Internal Voltage Reference	No
Zero Cross Detect	No
No. Of 8-bit timers	1
No. Of 16-bit Timers	3
Signal Measurement Timer	No
Hardware Limit Timer	No
No. Of PWM outputs	2
Max PWM resolution	8-bit
Angular Timer	No
Math Accelerator	No
No. Of UART module	1
No. Of SPI Module	1
No. Of I2C module	1
No. Of USB Module	Nil
Windowed Watchdog Timer (WWDT)	No
CRC/Scan	No
Numerically Controlled Oscillator	No
Cap. Touch Channels	Nil
Segment LCD	No
Minimum Operating Temperature (*C)	-40°C
Maximum Operating Temperature (*C)	125°C
Minimum Operating Voltage (V)	2V
Maximum Operating Voltage (V)	5.5 V
High Voltage Capable	No

Programming PIC Microcontroller

PIC microcontrollers can be programmed with different software that is available in the market. There are people who still use Assembly language to program PIC MCUs. The below details is for the most advanced and common software and compiler that has been developed by Microchip itself.

In order to program the PIC microcontroller, we will need an IDE (Integrated Development Environment), where the programming takes place. A compiler, where our program gets converted into MCU readable form called HEX files. An IPE (Integrated Programming Environment), which is used to dump our hex file into our PIC MCUs.

IDE: MPLABX v3.35

IPE: MPLAB IPE v3.35

Compiler: XC8

Microchip has given all these three software for free. They can be downloaded directly from their official page. I have also provided the link for your convenience. Once downloaded, install them on your computer. If you have any problem doing so, you can post them on the comment below.

To dump or upload our code into PIC, we will need a device called PICkit 3. The PICkit 3 programmer/debugger is a simple, low-cost in-circuit debugger that is controlled by a PC running MPLAB IDE (v8.20 or greater) software on a Windows platform. The PICkit 3 programmer/debugger is an integral part of the development engineer's tool suite. A basic programming circuit for PIC18F452 is given below.

PIC18F452 Programming Circuit

In addition to this, we will also need other hardware like a Perf board or breadboard, Soldering station, PIC ICs, Crystal oscillators, capacitors, etc.