PIC16F874-20I/P

Program Memory Type:	FLASH
Base Part Number:	PIC16F874
Supplier Device Package:	40-PDIP
Package / Case:	40-DIP (0.600", 15.24mm)
Operating Temperature:	-40°C ~ 85°C (TA)
Oscillator Type:	External
Data Converters:	A/D 8x10b
Voltage - Supply (Vcc/Vdd):	4 V ~ 5.5 V
RAM Size:	192 x 8
EEPROM Size:	128 x 8
Series:	PIC® 16F
Program Memory Size:	7KB (4K x 14)
Number of I/O:	33
Peripherals:	Brown-out Detect/Reset, POR, PWM, WDT
Connectivity:	I²C, SPI, UART/USART
Speed:	20MHz
Core Size:	8-Bit
Core Processor:	PIC
Part Status:	Active
Packaging:	Tube

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Introduction

PIC16F874-20I/P is a microcontroller developed by Microchip. It is an 8-bit device typically used in embedded systems, including control and automation applications such as motor control, industrial process control, and medical instrumentation. It has an onboard 8 Kbytes of flash memory, with powerful instruction set and interrupt capabilities. This microcontroller is also highly integrated and features a range of peripherals, such as a serial peripheral interface (SPI), Universal Synchronous Asynchronous Receiver Transmitter (USART), and a multi-channel 10-bit analog-to-digital converter (ADC).

Application Field

This microcontroller is used extensively in embedded systems and control applications due to its high performance and integrated peripherals. The on-chip components allow for increased efficiency when it comes to controlling multiple outputs and inputs.The PIC16F874-20I/P can be used in motor control applications, including control systems for AC and DC motors, servo motors, and linear actuators. It is also well-suited for industrial process control applications, such as temperature and pressure control, and can be implemented in data acquisition systems for controlling valve position, conveyor speed, and level sensing.This microcontroller is suitable for a wide range of medical instrumentation applications. It can be used for monitoring vital signs, drug delivery systems, blood test equipment, and many other types of medical diagnostics equipment.

Working Principle

The main principle of operation for the PIC16F874-20I/P microcontroller is based on the fetch-decode-execute cycle. This is a basic cycle of operation used in many computing systems, including microcontrollers.The cycle starts with the microcontroller receiving an instruction from the program memory. The instruction is decoded, and then acted upon accordingly. This includes reading and writing data to and from memory, as well as performing math and logical operations. The execution process repeats itself with each successive instruction until the program is complete.The microcontroller is capable of handling multiple instructions at once, thanks to its interrupt capability. This enables the microcontroller to respond to unexpected events in real-time, allowing the user to quickly react to changing conditions.

Conclusion

The PIC16F874-20I/P is an 8-bit microcontroller developed by Microchip and suited for embedded systems and control applications. It is a highly integrated device with powerful instructions and interrupt capabilities. Its onboard 8 Kbytes of flash memory allows for a range of applications, from motor control and industrial process control to medical instrumentation. The fetch-decode-execute cycle is the core principle of operation for this microcontroller, which is capable of handling multiple instructions at once via its interrupt capability.

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