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What is the function of ready pin of 8085 microprocessor?
The READY pin on the 8085 microprocessor is used to delay the completion of a bus transfer cycle. It is sampled by the 8085 at the falling edge of clock following ALE. If it is high, the cycle completes. If it is low, the cycle is extended by one clock, with all lines held steady - then it is sampled again at each of the next falling edges of clock until it is high. The purpose of READY is to allow (usually) memory devices to operate at a slower speed than the 8085.
What is the function of CLKOUT pin in microprocessor 8085?
The CLK signal in the 8085 is the system clock, which is the External Input Frequency or Crystal divided by two. It can be used to develop bus control logic, because it is essentially the inverse of ALE for one half clock cycle.
What is the function of READY pin of 8085?
The READY pin on the 8085 microprocessor is used to delay the completion of a bus transfer cycle. It is sampled by the 8085 at the falling edge of clock following ALE. If it is high, the cycle completes. If it is low, the cycle is extended by one clock, with all lines held steady - then it is sampled again at each of the next falling edges of clock until it is high. The purpose of READY is to allow (usually) memory devices to operate at a slower speed than the 8085.
What is microprocesser 8085?
microprocessor 8085 is basic 8 bit microprocessor by Intel Corp. it has 64Kb memory and 16 address buses and 8 data buses it has 40 pin ic. 8 address and 8 data buses are multiplexed with each other for reducing the total number of pins from the microprocessor 8085 . it require 5MHz clock frequency for operation. only a crystal which connected easily across two pins of microprocessor can provide this clock.
What is function of hold pin in 8085 microprocessor?
The HOLD pin on the 8085 is an external request for control of the bus. Upon receipt of HOLD, the 8085 will complete its current cycle and assert HLDA (HOLD Acknowledge), and then it will float the address, data, and control bus one half clock cycle later. The external hardware is then free to use the bus. When it is done, it releases HOLD, the 8085 releases HLDA, and the 8085 takes control of the bus and continues with the next cycle. HOLD is used by external DMA controllers, such as the 8257, to transfer data to and from memory on behalf of high speed peripherals, without requiring 8085 attention to that data transfer.
What is PMW in 8085 microprocessor?
I know of no PMW pin or PMW instruction in the 8085. Please restate the question. If you are asking about PWM, or pulse width modulation, please note that that is not an 8085 specific thing. It would be a function of system design, and you could achieve PWM with programming, but the answer would depend on the particulars of that system design.
How clock signal are generated in 8085 and what is the frequency of the internal clock?
Early microprocessor neded clock input to be given externally, i.e. an extra clock generator chip is necessary. the clock generator chip had two pins between which a crstal or an RC circuit could be connected for the generation of basic frequency desired. however, microprocessor, that were designed after 1978(Intel 8085, M6809, etc.) had the clock generator circuit embedded in the microprocesor chip.
How can you trap mask in 8085 microprocessor?
The TRAP instruction in the 8085 is NONMASKABLE, which means it cannot be masked, i.e. it cannot be disabled. The only way to mask or disable TRAP is with external hardware, such as an I/O pin and an AND gate.
What is pin configuration of microprocessor 8088?
the pin configuration of a processor means that the diagramatic representation of block diagram of processor representing various pins and the function of that pins
What is vss in 8085 pin digram?
Vss, also known as Gnd, is pin 20 on the 8085.
Why 8085 is a 40 pin ic?
The 8085 is a 40 pin ic because Intel designed it that way.
What is ALE in 8085 in microprocessor?
ALE=Address Latch Enabled.(pin number 30 in 8085)8085 has a special pin referred as ALE, which indicates whether multiplex bus functions as an address bus or a data bus. Whenever 8085 starts any new operation, ALE signal goes to logic 1 for about 1/2 clock cycle, at about the falling edge of CLK. If ALE=1 then multiplex bus functions as address bus. After that half clock cycle, it goes to logic 0 for nearly 3 or 4 clock cycles. If ALE=0 then multiplex bus acts as a data bus.The ALE pin helps to enable the latching of lower order ADDR bus. The AD0-AD7 pins, as well as other control pins such as S0, S1, IO/M-, and the other address pins A8-A15, are setup to be correct at the falling edge of ALE.
