8051 Microcontroller

Introduction to MAX 232 IC The MAX 232 device is a dual driver/receiver that includes a capacitive voltage generator to   supply EIA-232 voltage levels from a single 5V supply. The voltage level in the RS232 bus is about 30V. Each receiver converts EIA-232 inputs to 5V TTL/CMOS levels. These receivers have a typical threshold of 1.3V and a typical hysteresis of 0.5 V, and can accept ±30V inputs. Each driver converts TTL/CMOS input levels into EIA-232 levels. It is used in battery-powered systems, Terminals, modems, computer and many other applications. Only one of the driver and receiver is utilized here.

Below are 20 very most important questions for GTU Microcontroller and Interfacing (MCI) Exam. We recommend you to prepare these first and then go for other topics. 1.How Embedded Microcontrollers are differing than Embedding Microprocessor? 2. Explatn RISC and CISC ? Which is most suited to Intel 51 Microcontroller? Why? 3. What is Special Function register (SFR) of 51-Microcontroller? List all the SFR and explain SBUF, IP,TMOD,TCON and PCON. 4.Describe and Draw Architecture of intel-51, 8-bit Microcontroller 5. What is flag register? Explain 8051 Flag register and its practical implementation 6.Define and describe the directives of 51 Microcontroller. 7. What are the interrupts available in the 8051 microcontroller? Explain interrupt enable (IE) SFR and Interrupt priority (IP) SFR. 8. Draw and explain RESET and clock circuit of 8051 microcontroller. What is the purpose of capacitor in RESET circuit? 9. Explain interfacing of analog to digital converter (ADC) w