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Embedded - Microcontrollers

The N79E352RAFG is a low cost microcontroller from NXP Semiconductors that is intended for use in embedded applications. It was developed as a cost-effective alternative to the more expensive PIC microcontrollers. It features an 8-bit central processing unit (CPU), 64K bytes of flash program memory, 512 bytes of SRAM, an external bus interface (EBI) and a wide range of peripherals.

Features

The N79E352RAFG has a wide range of features that makes it suitable for embedded applications. It has an 8-bit CPU that is clocked at up to 20MHz, 64K bytes of Flash program memory, a built-in Flash Eprom controller and 512 bytes of internal SRAM. The chip also has an external bus interface (EBI) that can support up to 8 external memory devices. The chip also has 8-bit and 16-bit timer modules, an 8-channel 10-bit analog-to-digital converter and an 8-channel digital-to-analog converter. The chip also has two pulse width modulation (PWM) channels and supports both I2C and Serial Peripheral Interface (SPI) for peripheral control. The chip also has an internal oscillator with a range of frequencies from 0.25 MHz to 20 MHz.

Applications

The N7E352RAFG is suitable for a wide range of embedded applications due to its wide range of features. It can be used in home automation and security systems, automotive systems, industrial automation, medical devices and consumer electronics. The chip also has a low power consumption and high processing speed, making it ideal for battery-operated applications.

Working Principle

The N7E352RAFG is a Harvard architecture CPU which consists of five main blocks; the Program Counter, Program Memory, Data Memory, Bus Interface and Arithmetic Logic Unit. The program counter (PC) is responsible for storing the address of the next instruction and incrementing this address after each instruction retrieval. The Program Memory stores all the instructions that are used to control the microcontroller. The Data Memory is used to store data and can be accessed directly by the CPU. The Bus Interface allows the CPU to interact with external memory devices such as ROM, RAM and I/O devices. The Arithmetic Logic Unit (ALU) is responsible for performing the mathematical operations required for the execution of instructions.

The N79E352RAFG features a Harvard architecture which means that it is able to access both program and data memory simultaneously. This makes the CPU faster, as it can fetch instructions from the program memory while it is performing calculations on data stored in data memory. This architecture also allows the CPU to have direct access to all the I/O ports, making it a very efficient and cost-effective solution for embedded applications.

Conclusion

The N79E352RAFG is a low cost but highly capable microcontroller that is suitable for a variety of embedded applications. It has a wide range of features, including an 8-bit CPU, 64K bytes of Flash program memory, an external bus interface (EBI) and a wide range of peripherals. The chip also has a low power consumption and a high processing speed, making it ideal for battery-operated applications. Finally, its Harvard architecture allows the CPU to access both program memory and data memory simultaneously, allowing for fast and efficient operation.

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