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What are counters and time delays in 8085 microprocessor?

Anonymous

∙ 13y ago

Updated: 11/6/2022

1.A counter is designed simply by loading an appropriate number into one of the registers and using INR(increment by 1) & DCR(decrement by 1) instructions.

2.A loop is established to update the count,and each count is checked to determine whether it has reached the final number or not.if not then the loop is again repeated.

3.These counters have 1 drawback.i.e.counting is performed at such high speed that only the last count can be observed.to observe counting there must be a proper time delay between counts.

Wiki User

∙ 13y ago

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Related Questions

How do you load 32 bit data in 8085 microprocessor?

The 8085 is an 8 bit microprocessor. It cannot directly handle 32 bit data. That said, it is possible to write a routine that can handle 32 bit data, just 8 bits at a time.

What is the use of command MOV A A in 8085 microprocessor?

The MOV A,A instruction in the 8085 does nothing, not even change flags. It only consumes time, specifically four clock cycles plus applicable wait states.

What is meaning of 8085 microprocessor?

8085 is a 8 bit microprocessor designed by Intel.

Intel 8253 memory chip interface to 8085?

Intel 8253 is a programmable timer and it can be interfaced to 8085. This can be used as a real time clock, square wave generator and this is possible because 8253 can create accurate time delays.

What is the use of NOP instruction in 8085?

The NOP (No Operation) instruction takes time but does nothing to the data or the status of the microprocessor. When executed in a loop, it can take substantial time, from microseconds, to milliseconds, to seconds.

What is subroutine in 8085?

in 8085 microprocessor a subroutine is a separate program written aside from main program ,this program is basically the program which requires to be executed several times in the main program. the microprocessor can call subroutine any time using CALL instruction . after the subroutine is executed the subbroutine hands over the program to main program using RET instruction.

What is NOP Instruction stands in 8085 microprocessor?

The NOP instruction is a no-operation instruction. It does nothing to the state of the machine, except to use some time. In the case of the 8085, it uses four clock cycles plus however many wait states are need to access the NOP instruction from memory.

Why 8085 microprocessor's AD BUS go into high impedence state before switching as a data data bus?

The 8085 microprocessor's AD bus goes into high impedance state before switching as a data input bus because you don't want two bus drivers driving the bus at the same time. You give the bus time to float between transfer of control, otherwise there will be large power transients at switchover, and you could damage the drivers.

Draw a schemetic to demultiplex bus ad0-ad7 using any octal latch in 8085 microprocessor?

The 8085 microprocessor is used IC 74LS373 to latch the address of 8085. Basically latch is consists of 8 flip flops. Generally we used D-flip flops (Delay).The clock of these flip flops are connected together and available as a output pin called enable.Working : The address will appear on AD0 AD7 lines. The ALE will go high and forcingEnable = 1. This will make latch enable and ready to work. Before address disappears ALE = 0. This will make latch disable. AD0 - AD7 will now be used as data bus.Hence, AD0 - AD7 (low order) address bus of the 8085 microprocessor is multiplexed (time-shared) with the data bus. The buses need to be demultiplexed.

What is the advantages and disadvantages of 8086 microprocessor?

the advantages of 8086 microprocessor over 8085A microprocessor is that 1)it is a 16 bit microprocessor 2)the disadvantages in 8085A microprocessor like low speed,limited number of registers,low memory addressing capability,less powerful instruction set have been overcome in 8086 registers

What is T states in counters and time delay in 8085 microprocessor?

1.A counter is designed simply by loading an appropriate number into one of the registers and using INR(increment by 1) & DCR(decrement by 1) instructions.2.A loop is established to update the count,and each count is checked to determine whether it has reached the final number or not.if not then the loop is again repeated.3.These counters have 1 drawback.i.e.counting is performed at such high speed that only the last count can be observed.to observe counting there must be a proper time delay between counts.

What is dsp?

A digital signal processor (DSP) is a type of microprocessor - one that is incredibly fast and powerful. A DSP is unique because it processes data in real time. This real-time capability makes a DSP perfect for applications where we won't tolerate any delays

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