Im using an ARM Cortex-M3(LPC1768).I would like to know how many oscillator periods make up 1 instruction cycle for arm.Like for example,12 oscillator periods make up 1 instruction cycle for 8051.

I would like to use the the number of oscillator periods for each instruction in delay calculations for instructions like NOP etc.

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  • When they say frequencies for the processor that is one cycle for every processor cycle. Typically for M series chips they have a phased locked loop driving the CPU and use either an external or internal oscillator which can have a much lower frequency than the CPU.

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  • When they say frequencies for the processor that is one cycle for every processor cycle. Typically for M series chips they have a phased locked loop driving the CPU and use either an external or internal oscillator which can have a much lower frequency than the CPU.

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