Microchip PIC16F628-20I/P 8-Bit Microcontroller Datasheet and Application Overview
The Microchip PIC16F628-20I/P is a high-performance, low-cost 8-bit microcontroller from Microchip Technology’s extensive PIC® (Programmable Intelligent Computer) family. Housed in a 18-pin PDIP package, this device is built on an enhanced RISC architecture, balancing processing power with exceptional power efficiency, making it a versatile solution for a wide array of embedded control applications.
Core Architectural Features
At the heart of the PIC16F628-20I/P lies a robust 8-bit RISC CPU core. It operates at a maximum frequency of 20 MHz, denoted by the "-20" in its part number, which translates to a instruction cycle time of 200ns. This allows for the execution of most instructions in a single cycle, achieving a throughput of up to 5 MIPS (Million Instructions Per Second).
The device is equipped with 3.5 KB of Flash program memory, which is reprogrammable, enabling rapid prototyping and field updates. It also contains 224 bytes of RAM for data storage and 128 bytes of EEPROM for non-volatile storage of critical data that must persist even after a power cycle. A key feature of this microcontroller is its on-board programmable oscillator, which can be configured for multiple modes (LP, XT, HS, INTRC), often eliminating the need for an external crystal, thus reducing component count and board space.
Peripheral Integration and I/O Capabilities
The PIC16F628-20I/P is renowned for its rich set of integrated peripherals, which are designed to interface directly with the external world. Its 16 I/O pins are highly flexible, with individual direction control and features like high current sink/source for direct LED driving.
Notable integrated peripherals include:
Two analog comparators with programmable on-chip voltage reference.
Two 8-bit timers (Timer0, Timer2) and one 16-bit timer (Timer1) for precise timing and event capture/compare operations.
USART (Universal Synchronous Asynchronous Receiver Transmitter) module, enabling serial communication protocols like RS-232 and RS-485.
CCP (Capture/Compare/PWM) module, which is crucial for applications such as measuring signal pulse widths or generating PWM signals for motor control or dimming LEDs.
Application Overview
The combination of processing power, memory, and integrated peripherals makes the PIC16F628-20I/P suitable for a diverse range of applications. It is commonly deployed in:
Consumer Electronics: Remote controls, smart sensors, and small appliances.
Industrial Control: Sensor interfaces, motor controllers, and power management systems.
Automotive: Aftermarket accessories like LED lighting controllers and simple sensor modules.
Hobbyist and DIY Projects: Its ease of use and availability of development tools make it a favorite in the maker community.
Development and Programming
Development is supported by Microchip’s MPLAB® X IDE and the PICKit™ series of programmers/debuggers. This ecosystem provides a seamless environment for writing code in C or assembly, simulating, debugging, and programming the device.
ICGOODFIND: The Microchip PIC16F628-20I/P remains a highly relevant and capable 8-bit microcontroller, offering an optimal blend of performance, peripheral integration, and cost-effectiveness. Its self-contained clocking option and non-volatile EEPROM provide significant design flexibility, making it an enduring choice for engineers designing cost-sensitive, feature-rich embedded systems across numerous industries.
Keywords: 8-bit Microcontroller, PIC16F628, RISC Architecture, Integrated Peripherals, Embedded Control.
