Bissoy.com
Doctors Medicines MCQs Q&A

When a program is being executed in an 8085 microprocessor, its program counter contains

When a program is being executed in an 8085 microprocessor, its program counter contains Correct Answer The memory address as the instruction that is to be executed next

The Program counter (PC):

  • The program counter acts as a pointer to the next instruction to be executed and always contains the 16-bit address of the memory location of next instruction
  • It is a 16 bit register as 8085 has 16 address lines
  • The program counter is updated by the processor and points to the next instruction after the processor has fetched the complete instruction

Related Questions

What happens when the RET statement is executed in 8085 μp? (a) Program counter is cleared (b) Control is transferred from the subroutine to the main program (c) Returning address is loaded into the accumulator (d) Returning address is loaded into the program counter from the top of the stack The correct answer is:
Consider three software items: Program-X, Control Flow Diagram of Program-Y and Control Flow Diagram of Program-Z as shown below Program-X: Control Flow Diagram of Program-Y sumcal (int maxint, int value) {       int result=0, i=0;       if (value <0)       {           Value = -value;       }       while ( (i
In an 8085 microprocessor system, the following program starts at location 0100H LXI SP 00FF LXI H 0701 MVI A 20H SUB M The content of the accumulator when the program counter reaches 0107 H is
With reference to 8085 microprocessor, which of the following statements are correct? 1. The DAD instruction adds the contents of the specified register pair to the contents of the DE register pair 2. The program counter is an instruction pointer 3. Whenever an instruction uses the HL pointer, the addressing is called indirect addressing. 4. HL register pair is also called data pointer
After the following instructions of 8085 microprocessor is executed the registers BC and HL will contain what values? LXI SP, 2099H LXI B, 424FH LXI H, 64A5H PUSH B PUSH H POP B POP H RET
The following sequence of instructions is executed by an 8085 microprocessor: 1000 LXI SP, 27FF 1003 CALL 1006 1006 POP H What are the contents of the stack pointer (SP) and the HL register pair after completion of execution of these instructions?
Name of the register which stores the address of the next instruction to be executed in 8085 in microprocessor
Which of the following statements regarding interface circuit are correct? 1. Electrical buffering is needed when the peripheral operates at a different voltage or current to that on the microprocessor bus system or there are different ground references. 2. Timing control is needed when the data transfer rates of the peripheral and the microprocessor are different. 3. Changing the number of lines is needed when the codes used by the peripherals differ from those used by the microprocessor.
Which of the following statements regarding binary counters are correct? (a) Clock inputs of all the flip - flops of a synchronous counter are applied from the same source whereas those in an asynchronous counter are from different sources. (b) The asynchronous counter has ripple effects whereas the synchronous counter does not. (c) Only J-K flip-flops can be used in synchronous counters whereas asynchronous counters can be designed with any kind of flip flops. (d) Latches can be used for designing asynchronous counters. Code :
A 12 MHz clock frequency is applied to a cascaded counter containing a modulus-5 counter, a modulus-8 counter, and a modulus-10 counter. The lowest output frequency possible is ________