Category: Microcontrollers
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Key Features of PIC16X84 Family of Microcontrollers
PIC microcontrollers are fabricated by Microchip Technology. PIC16C84 and PIC16F84 are the two microcontrollers in the PIC16X84 family of microcontrollers. PIC16F84 is the enhanced version of PIC16C84. Microcontroller & Peripheral Related Features PIC16X84 family of microcontrollers possess the following key features: Architecture and Pin Connection Diagrams Architecture of PIC16X84 family of microcontrollers Pin connection diagram…
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ADD Instruction in Intel 8051 (MCS-51) Microcontroller
The ADD instruction tells the microcontroller’s CPU to add the source byte to register A and put the result in register A. Recall, A is the accumulator register typically used for all arithmetic and logic instructions. The ADD instruction is usually in the following form: ADD A, source ; ADD the source operand to the…
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Basic Features of 68HC11 Family of Microcontrollers
The 68HC11 (also abbreviated as 6811 or HC11) is an 8-bit microcontroller that was introduced by Motorola in the year 1984. The production of these chips was later done by Freescale semiconductor. Currently they are fabricated by NXP semiconductors which acquired Freescale semiconductor. I have listed some of the basic features of 68HC11 family of…
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The Procedure for Designing a Microcontroller-Based System
In envisaging a new microcontroller design, it is prudent to follow a design procedure that will take you from the initial problem statement to a programmed microcontroller that can be embedded in application hardware. In this article, we look at key steps to follow when you are designing a new microcontroller-based system. Describe the Problem…
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Main Features of 80C51, 87C51 and 80C31 Microcontrollers
All these three types of microcontrollers are 8-bit manufactured by NXP semiconductors with embedded Intel processors. Some of the key features of these microcontrollers are listed in the following sections but it is important to note that, you can get the full and latest details on each of the specific device from the official documentation.…
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How a Microcontroller can be used in a Temperature Measurement System
The figure below illustrates the key elements of a temperature measurement system employing a MC68HC11 microcontroller. The temperature sensor provides a voltage proportional to the temperature; an example of such a sensor is LM25 (a temperature sensor that can be used with an analogue to digital converter like ADC0804 to give a digital output suitable…
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How to Interface PIC Microcontroller to Input & Output Devices
In this article, we discuss how to interface the PIC microcontroller to various types of input and output devices. A key point to recall when dealing with PIC is that, each pin in the I/O ports may be configured in software as an input or an output. Furthermore, the port pins may be multiplexed with…
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How to Interface LCD Display to a Microcontroller
LCD crystal displays allow a better user interface compared with LED displays as it is much easier to display text messages in LCD displays. They also consume much less power than LED displays. Nonetheless, LED displays have better intensity than LCD displays LCD displays are available usually in 8 x 2, 16 x 2, 20…
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Interfacing LEDs & Electromechanical Relays to Microcontrollers
In this article, we briefly describe how to interface LEDs and electromechanical relays to microcontrollers. Note, a detailed description on how this is done can be found in the official documentation of the microcontroller you are working with. Here, we only look at the fundamentals on how this is done. Interfacing LEDs with Microcontrollers The…