期刊名称：Faculty of Computer Science and Information Technology
出版年度：2008
卷号：0
期号：0
语种：English
出版社：Faculty of Computer Science and Information Technology
摘要：ATMEL microcontroller is the main controllerof industry standards and current research, this is becauseit has many advantages compared to the microprocessor,which is cheaper, has the support of software, documen-tation is adequate, and require very little supportingcomponents. One type of microcontroller ATMEL forstandard applications that have a satisfactory feature isthe AT89S51. At this writing created a series of charactersusing AT89S51 viewer that has 4 ports and 8 bits for eachport. In this character the viewer a bit value that comesout will display a character on the led matrix. Generally,the more useful tools and can be found at red light, the tollbooth or the shops. Consumption of the required voltageis not too big. The interface can be seen in the dark or atnight. Principle is basically an LED with a resistor. If a bitis given the logical port that is connected to the LED, theoutput voltage of 4.5 volts will produce a result in thoseled is lit. Led are strung together so neatly arranged insuch a 8x8 (8 columns and 8 rows). If the LED is giventhe logic of one like the example above it can be used todisplay a character.
