This set of Microprocessor Multiple Choice Questions & Answers (MCQs) focuses on “Power Control Register”. 1. The power control register is a) used for power saving during idle state b) used for eventual power off to 8051 chip c) non-bit addressable register d) all of the mentioned 2. The state of signals in idle mode … Read more
This set of Microprocessor Multiple Choice Questions & Answers (MCQs) focuses on “Serial Communication Unit”. 1. The serial communication is a) cheaper communication b) requires less number of conductors c) slow process of communication d) all of the mentioned 2. The serial communication is used for a) short distance communication b) long distance communication c) … Read more
This set of Microprocessor Multiple Choice Questions & Answers (MCQs) focuses on “Interrupt Structure of 8051”. 1. The external interrupts of 8051 can be enabled by a) 4 LSBs of TCON register b) Interrupt enable c) priority register d) all of the mentioned 2. The bits that control the external interrupts are a) ET0 and … Read more
This set of Microprocessors Questions and Answers for Campus interviews focuses on “Interfacing With 8051 Ports -2”. 1. If EA(active low) signal =1, then the execution starts from a) internal EPROM b) flash RAM c) internal EPROM or flash RAM d) none 2. The pin that is grounded for interfacing external EPROM is a) EA(active … Read more
This set of Microprocessor Multiple Choice Questions & Answers (MCQs) focuses on “Interfacing With 8051 Ports -1”. 1. Which of the following is not one of the SFR addresses of the ports of 8051? a) 80H b) 90H c) A0H d) NONE 2. Each port line of a port can individually source a current of … Read more
This set of Microprocessors Questions and Answers for Aptitude test focuses on “8051 Instruction Set -2”. 1. If the most significant bit of relative address byte is 1, then the short jump instruction is a) forward jump b) back jump c) either forward or back jump d) none 2. The first byte of an absolute … Read more
This set of Microprocessor Multiple Choice Questions & Answers (MCQs) focuses on “8051 Instruction Set -1”. 1. Which of the following is not an instruction of 8051 instructions? a) arithmetic instructions b) boolean instructions c) logical instructions d) none 2. The operations performed by data transfer instructions are on a) bit data b) byte data … Read more
This set of Microprocessor Multiple Choice Questions & Answers (MCQs) focuses on “Addressing Modes of 8051”. 1. Which of the following is not an addressing mode of 8051? a) register instructions b) register specific instructions c) indexed addressing d) none 2. The symbol, ‘addr 16’ represents the 16-bit address which is used by the instructions … Read more
This set of Microprocessors Assessment Questions and Answers focuses on “Interrupt and Stack of 8051 – 2”. 1. The timer generates an interrupt, if the count value reaches to a) 00FFH b) FF00H c) 0FFFH d) FFFFH 2. The external interrupt that has the lowest priority among the following is a) TF0 b) TF1 c) … Read more
This set of Microprocessor Multiple Choice Questions & Answers (MCQs) focuses on “Interrupt and Stack of 8051 -1”. 1. Which of the following is an external interrupt? a) INT0(active low) b) INT2(active low) c) Timer0 interrupt d) Timer1 interrupt 2. The interrupts, INT0(active low) and INT1(active low) are processed internally by flags a) IE0 and … Read more
