PIC16F84A-20I/SS

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Introduction

The PIC16F84A-20I/SS microcontroller is a low-cost, single-chip device offered by Microchip Technology. This microcontroller has been widely used in embedded system applications, such as consumer electronics, automotive, building and home control systems, etc. It is based on the 8-bit RISC architecture, which can be used to perform quite complex tasks with a low power draw.

Application Field

PIC16F84A-20I/SS features various features that make it an ideal choice for embedded applications. One of the most notable features is its low power draw. This microcontroller can run in full speed with a current of less than .5 mA. It also features an I/O (I/O interface) which allows external peripherals to be connected to the microcontroller. The user-programmable memory allows a wide range of tasks to be done, such as sending and receiving data, controlling motors, and monitoring various types of sensors.

In addition to these features, the PIC16F84A-20I/SS also has a built-in watchdog timer, which can be used to monitor the microcontroller’s activity, and to detect and respond to faults. This feature makes it suitable for applications in which safety is critical, such as automotive applications. Furthermore, the PIC microcontroller can be used in applications where it needs to interact with other components, such as in home automation systems.

Overall, the PIC16F84A-20I/SS is an excellent microcontroller for a variety of embedded applications, due to its low power consumption, programmable memory, I/O ports, and other features.

Working Principle

The working principle of PIC16F84A-20I/SS can be summarized as follows: the microcontroller is programmed using a dedicated toolset, usually provided by the manufacturer. This programming provides instructions to the microcontroller on how to execute various tasks. The program stores data in internal memory, called ROM, and uses this data to execute instructions. The microcontroller then performs the instructed task, such as reading from a sensor, or controlling a motor.

In order to calculate the necessary instructions, the microcontroller needs to process information from its input ports. This information is read and converted into digital signals, which can then be used to generate instructions. The instructions generated by the microcontroller are then sent to its output ports in order to control peripherals.

The PIC16F84A-20I/SS works in a closed-loop system, so that once it has sent the instructions to its output port, the instructions are sent back to the input port and the loop continues until the desired result is achieved. The instructions are then stored in its non-volatile memory to ensure that the same instructions are executed each time the microcontroller is powered up.

Conclusion

PIC16F84A-20I/SS is an excellent 8-bit RISC microcontroller which is suitable for a wide range of embedded applications. It is easy to program and features a low power draw, a user-programmable memory, built-in watchdog timer, and an I/O interface. It works in a closed-loop system, whereby it executes instructions sent back to it from its output ports. As a result, this microcontroller is an ideal choice for applications where safety, low power draw, and flexibility are key.

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