PIC16F874-20/PQ

Program Memory Type:	FLASH
Base Part Number:	PIC16F874
Supplier Device Package:	44-MQFP (10x10)
Package / Case:	44-QFP
Operating Temperature:	0°C ~ 70°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:	Tray

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The PIC16F874-20/PQ is a member of the enhanced-mid range CPU family of microcontrollers from Microchip Technology. The controller is designed to provide an embedded platform for a wide range of embedded applications and is one of the most popular of its family. This article focuses on the application fields and the working principle of the PIC16F874-20/PQ microcontroller.The main application field for the PIC16F874-20/PQ is in embedded systems that require a high degree of power efficiency and cost effectiveness. This includes industrial and home automation, consumer electronics, medical devices, energy management systems and other embedded applications. Its powerful features, combined with its low cost and low power consumption, make it an ideal choice for a variety of applications.The PIC16F874-20/PQ is a 8-bit RISC microcontroller with 14-bit programmable core. It is a single-cycle instruction set architecture that supports several addressing and data manipulation modes, making it a highly versatile processor. The device is capable of addressing up to 128K of external program memory and 16K of internal RAM. It is also capable of addressing as many as 256 I/O lines. It supports one-cycle and two-cycle instruction execution and can be clocked up to 40 MIPS peak.The PIC16F874-20/PQ has two main bus interfaces – the PORTB, which can be configured as separate address and data buses and the PORTA, which is used as a single data bus. The PORTB is configured as either an asynchronous memory interface or as a parallel peripheral interface. The PORTA is used as an 8-bit/16-bit/32-bit serial peripheral interface that can be used to communicate with external peripherals and sensors.The PIC16F874-20/PQ also provides several advanced features, such as on-chip debug, oscillator conformance test, and a power management unit. It is available in various packages and can be powered from 4.5V to 6.5V.In terms of its working principle, the PIC16F874-20/PQ is a sequential programming architecture. The microcontroller is programmed by its on-chip memory which is configured by a set of instructions contained within the on-chip program memory. These instructions are then executed one after the other in a sequential manner, as defined by the program contained in the on-chip program memory. This sequential programming model allows for the easy debugging and modification of a program.The PIC16F874-20/PQ is a highly versatile and powerful microcontroller that is well suited for embedded applications such as industrial and home automation, consumer electronics, medical devices, energy management systems and other embedded applications. With its low power consumption, low cost and powerful features, it is an ideal choice for a variety of embedded applications.

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