microcontroller 8051 basic interview questions pdf

This has brought about many, versions of the 8051 with different speeds and amounts of on-chip ROM marketed by way of more than half of a dozen manufacturers. They please with the circumstance that they continue to be code-well suited with the 8051. The 8051 have become extensively famous after Intel allowed other producers to make and marketplace any flavors of the 8051. In 1981, Intel Corporation added an 8-bit microcontroller called the 8051. Introduction Of 8051 Microcontroller Architecture? Users cannot access these temporary registers.Top 100+ 8051 Microcontroller Interview Questions And Answers The registers that are not accessible by the user areĬlarification: The arithmetic operations are performed over the operands held by the temporary registers, TMP1 and TMP2. The device that generates the basic timing clock signal for the operation of the circuit using crystal oscillator isĬlarification: The oscillator circuit generates the basic timing clock signal for the operation of the circuit using crystal oscillator.ġ1. The register that provides control and status information about serial port isĬlarification: The registers, PCON and SCON contain control and status information about serial port.ġ0. The register that provides control and status information about counters isĬlarification: The registers, TMOD and TCON contain control and status information about timers/counters.ĩ.

The transmit buffer is a parallel-in serial-out register and receive buffer is a parallel-in serial-out register.Ĩ. The receive buffer of serial data buffer is aĬlarification: The serial data register has two buffers. The transmit buffer of serial data buffer is aĬlarification: The transmit buffer of serial data buffer is a parallel-in serial-out register.ħ. It contains two 16-bit timer registers.Ħ. Which of the processor’s stack does not contain the top-down data structure?Ĭlarification: The 8051 stack is not a top-down data structure, like other Intel processors.Ĭlarification: The architecture of 8051 consists of 4 latches and driver pairs are allotted to each of the four on-chip I/O ports. The registers that contain the status information isĬlarification: The set of flags of program status word contains the status information and is considered as one of the special function registers.Ĥ. In other instructions, it may just be used as a scratch pad.ģ. The register that can be used as a scratch pad isĬlarification: B register is used to store one of the operands for multiply and divide instructions. The register that may be used as an operand register isĬlarification: In some instructions, the Accumulator and B register are used to store the operands.Ģ.

Microprocessor Multiple Choice Questions on “Architecture of 8051”.ġ.

Microcontroller 8051 basic interview questions pdf