PIC16C781-I/SO

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Embedded microcontrollers are the brain behind almost any embedded device found in consumer products and industrial systems. Microcontrollers come in many shapes and sizes, and their uses are virtually limitless. PIC16C781-I/SO is an 8-bit microcontroller from Microchip Technologies with an array of features that makes it suitable for a wide range of application. This article will discuss the application field and working principle of the PIC16C781-I/SO.

Application Field

The PIC16C781-I/SO is a versatile and complex microcontroller, making it suitable for a variety of different applications. Its primary purpose is the computer control of embedded devices, which can include tasks from industrial automation to consumer products. Specific products that use this microcontroller are:

• Commercial die cutting equipment
• Medical instrumentation
• Domestic appliances
• Heating and air conditioning
• Office equipment
• Industrial automation system

The PIC16C781-I/SO stands out from other microcontrollers due to its features that are tailored towards chip embedded applications. It provides a 32Kb ROM, 1.5Kb RAM, 68 I/Os and eight 10-bit ADC channels, making it suitable for applications with high input/output (I/O) requirements. Additionally, it has a self-programming EEPROM which is capable of storing hardware parameters and can undertake data logging of up to 1 million writes per byte.

Furthermore, the PIC16C781-I/SO incorporates a master/slave communication interface which allows for RS-232 or SPI communication between the PIC and a connected controller. It also provides two timer capture pairs which can measure frequencies, duty cycles and pulse widths, providing the microcontroller with touch sensing and motion control features.

In addition, the PIC16C781-I/SO is capable of executing instructions in the range of 1 to 8 MHz with 0 wait cycles. This is the fastest instruction cycle of any 8-bit microcontroller. It also requires no external oscillator making it a small and low-cost solution for many applications.

Working Principle

The PIC16C781-I/SO’s main working principle is based on an enhanced Harvard architecture. This contains two separate pipelines for program and data flow, allowing for the simultaneous fetching and execution of instructions and access to memory.

The instruction set includes a variety of operations. These can be control transfers, logical operations, and math operations which can compute the addition, subtraction, comparison, and manipulation of binary data. Furthermore, the PIC16C781-I/SO’s instruction set contains several extended instructions to reduce the memory footprint of user programs.

The PIC16C781-I/SO also features an advanced debug mode which allows for single-step program execution and break points. This allows for easy debugging and modification of user programs.

The PIC16C781-I/SO features an 8-bit special purpose register (SPR), which can be used as a single accumulator or as two independent 4-bit registers. The SPR can also be used for determining jump addresses, defining 8-bit data values, and temporality storing I/O port functions.

In addition, the PIC16C781-I/SO provides a wide range of peripherals allowing for the connecting of external devices and the controlling of multiple processes from one module. This includes a 10-bit analog to digital converter (ADC), a 2MHz oscillator, and a serial interface.

These features, along with the PIC\'s fast instruction cycle, enable the microcontroller to undertake a variety of tasks including data manipulation, memory access, data transfer and communication.

The PIC16C781-I/SO is a versatile and powerful microcontroller that is suitable for a variety of different embedded applications. Its versatile features, fast instruction cycle and simple programming make it an ideal choice for many operations. Whether used for consumer electronics or industrial automation, this microcontroller is a reliable and cost-effective solution.

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