![]() So to interface UART with 8051, we just need the basic signals. To communicate over UART or USART, we just need three basic signals which are namely, RXD (receive), TXD (transmit), GND (common ground). ![]() ![]() 1 shows how to interface the UART to microcontroller. ☞The voltage levels of a microcontroller and PC are not directly compatible with those of RS-232, a level transition buffer such as MAX232 be used. It is commonly used in data acquisition applications, for the transfer of data between the microcontroller and a PC. ☞ RS-232 communication enables point-to-point data transfer. It also includes two receiver and two transmitters and is capable of full-duplex UART/USART communication. This IC includes charge pump which can generate RS232 voltage levels (-10V and +10V) from 5V power supply. The most commonly used RS-232 level converter is MAX232. ![]() So a voltage or level converter is needed which can convert TTL to RS232 and RS232 to TTL voltage levels. Usually all the digital ICs work on TTL or CMOS voltage levels which cannot be used to communicate over RS-232 protocol. UART ( Universal Asynchronous Receiver Transmitter) are one of the basic interfaces which provide a cost effective simple and reliable communication between one controller to another controller or between a controller and PC. NXP’s 8051 ( AT89V51RD2), 8051 Development board is proposed to smooth the progress of developing and debugging of various designs encompassing of speed 8-bit Microcontrollers. The kit supports in system programming (ISP) which is done through serial port. The kit is designed in such way that all the possible features of the microcontroller will be easily used by the students. The 8051 Development board is specifically designed to help students to master the required skills in the area of embedded systems. ![]() Natural Language Processing Projects (NLP Projects). ![]()
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