PIC MICROCONTROLLER
ARCHITECTURE OF 8085
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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333.333 ns
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0.333 s
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0.333 ks
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3.333 us
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Detailed explanation-1: -Detailed Solution The crystal frequency of 8051 is 12 MHz . Therefore the machine cycle for a system of 12MHz is µ 1 µ s .
Detailed explanation-2: -Calculation of IPC The number of instructions per second and floating point operations per second for a processor can be derived by multiplying the number of instructions per cycle with the clock rate (cycles per second given in Hertz) of the processor in question.
Detailed explanation-3: -In 8051-based system, the crystal oscillator has a frequency of 11.0592 MHz when C/T bit of TMOD is 0. Each machine cycle is made up of 12 clock cycles. Hence for a single machine cycle, the frequency becomes 1/12 × 11.0529 MHz = 921.6 KHz.
Detailed explanation-4: -With a 12 MHz clock frequency, the 8051 could thus execute 1 million one-cycle instructions per second or 500, 000 two-cycle instructions per second.