AT87LV51-16JI

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The AT87LV51-16JI is a high-performance, low-power version of an 8-bit Microcontroller with Flash program memory. It is developed by Atmel and is intended for the automotive industry. It is a multi-functional device and is used for many different purposes. This article will discuss the application field and working principle of the AT87LV51-16JI.

Application Field

The AT87LV51-16JI is designed for automotive applications, such as engine control, ABS and ignition systems. Its applications also include computers and medical equipment, as well as security systems, household appliances and industrial controllers. It has a high level of tolerance to a wide range of environmental factors, including temperature changes and electromagnetic interference.

It features peripheral features such as four 16-bit timers, two 8-bit timers, four 10-bit A/D converters, four separate USARTs, 8-channel 10-bit D/A, internal EEPROM and more.

Working Principle

The AT87LV51-16JI is an 8-bit microcontroller that operates on an 8051 architecture. The microcontroller works on the von Neumann architecture, in which a single data bus is used to communicate between memory and the processor. Atmel has implemented a Harvard architecture, however, using separate paths for instruction and data. This has resulted in improved performance, as the CPU can process instructions and data simultaneously.

The microcontroller has a Harvard-type memory organization with 64kbytes of addressable memory, which is divided into 32kbytes of internal RAM and 32kbytes of program memory. The AT87LV51-16JI also has an oscillator, interrupt controller, programmable input/output and timer functions.

The AT87LV51-16JI has an enter-stop instruction, which is used to temporarily put the microcontroller into a low-power mode. The instructions for this feature are as follows: ORL P3, #0Eh;MOV PMR, #0Fh; and MOV P3, #07h. The PMR instruction is used to write data to the port and the P3 instruction is used to read data from the port.

The AT87LV51-16JI also features a sleep mode, in which the microcontroller is put into a low-power state. This mode allows the device to enter a low-power state without affecting the program execution or the on-board peripherals.

Conclusion

The AT87LV51-16JI is a high-performance, low-power 8-bit Microcontroller with Flash program memory. It is suitable for a wide variety of applications, including automotive, computers and medical equipment, as well as security systems, household appliances and industrial controllers. The microcontroller works on the von Neumann architecture, with 64kbytes of addressable memory divided into 32kbytes of internal RAM and 32kbytes of program memory. It is capable of entering low-power states through the enter-stop and sleep instructions.

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