Att9c52 Case Study

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3.2 AT89c52: FIG 6: AT89C52 MICROCONTROLLER  The AT89c52 is a low power, high-performance CMOS 8-bit microcontroller with 8K bytes of in system programmable Flash memory. The device is manufactured using Atmel’s high density nonvolatile memory technology and is compatible with the industry standard 80c51 instruction set and pin out.  The on-chip flash allows the program memory to be reprogrammed in system or by a convention nonvolatile memory programmer. by combining a versatile 8-bit CPU within system programmable flash on a monolithic chip, the Atmel AT89c52 is a powerful microcontroller which provides a highly flexible and cost effective solution to many embedded control application.  The AT89c52 provides the following standard…show more content…
In order to put the rise of GSM in context, it is important to note that the climate of economic liberalization and opening up of new markets in Asia, Latin American and Eastern Europe helped boost analog system subscriber numbers throughout the 1990’s. The roll-out of a multinational global communications standard faced several formidable barriers. 3.4 LIQUID CRYSTAL DISPLY (LCD):  An LCD is a small low cost display. It is easy to interface with a micro-controller because of an embedded controller. This controller is standard across many displays (HD 44780) which means many micro-controllers have libraries that make displaying messages as easy as a single line of code.  LCD (Liquid Crystal Display) screen is an electronic display module and find a wide range of applications. A 16x2 LCD display is very basic module and is very commonly used in various devices and circuits. These modules are preferred over seven segments and other multi segment LEDs.  A 16x2 LCD means it can display 16 characters per line and there are 2 such lines. In this LCD each character is displayed in 5x7 pixel matrix. This LCD has two registers, namely, Command and…show more content…
12 D5 Data bus line 5 Pin no. 13 D6 Data bus line 6 Pin no. 14 D7 Data bus line 7 (MSB) 3.5 GPS What is the Global Positioning System?  The Global Positioning System was conceived in 1960 under the auspices of the U.S. Air Force, but in 1974 the other branches of the U.S. military joined the effort. The first satellites were launched into space in 1978. The System was declared fully operational in April 1995.  The Global Positioning System consists of 24 satellites that circle the globe once every 12 hours, to provide worldwide position, time and velocity information. GPS makes it possible to precisely identify locations on the earth by measuring distance from the satellites. GPS allows you to record or create locations from places on the Earth and help you navigate to and from those places.  Originally the System was designed only for military applications and it wasn’t until The 1980’s that it was made available for civilian use also. How GPS

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