To calculate the Fcy (Internal instruction cycle frequency) and Tcy (Internal instruction cycle time), we need to understand how the PLL (Phase-Locked Loop) affects the clock frequency.
The PLL is a feedback control system that generates an output signal that has a fixed relationship to the phase of the input signal. In this case, it is used to generate a stable clock frequency from the primary oscillator.
Let's assume the primary oscillator provides a clock signal with a frequency of Fosc (7.648 GHz). The PLL will then multiply this frequency by a certain factor (N) to generate the desired Fcy.
The formula to calculate Fcy is:
Fcy = (Fosc × N) / (M × 2 × O)
where:
- Fosc is the frequency of the primary oscillator (7.648 GHz)
- N is the multiplication factor of the PLL (depends on PLL configuration)
- M is the prescaler value (depends on the microcontroller configuration)
- O is the oscillator postscaler value (depends on the microcontroller configuration)
- 2 is the factor due to the PLL being in a divide-by-two mode (depends on the PLL configuration)
Without specific configuration details, we cannot determine the values of N, M, and O. Therefore, we cannot calculate the exact Fcy and Tcy. These values will depend on the microcontroller and its PLL configuration.
If you provide more details about the PLL configuration and microcontroller being used, I can help you further with the calculations.
The primary oscillator is used as the clock source and its frequency is 7.648 GHz. The PLL is used. In that case, what is Fcy (Internal instruction cycle frequency)? Also, what is Tcy? You must show your calculation. Failing to do so will result zero mark for this question.
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