the primary oscillator is used as the clock source and its frequency is 7.648 GHZ. the PLL is used. in that case, the FCY)? what is TCY? show your calculation
To calculate the FCY (instruction cycle frequency) and TCY (instruction cycle time), we need to know the PLL (Phase-Locked Loop) divisor and system clock frequencies. However, the specific values are not provided in your question. Please provide the PLL divisor and system clock frequencies, and I will be able to assist you further with the calculations.
To calculate the values of FCY and TCY, we need to consider the formula used to determine FCY:
FCY = (Primary oscillator frequency) / (PLL prescale value * PLL postscale value)
Here, the primary oscillator frequency is given as 7.648 GHz.
Assuming no prescale or postscale values are mentioned, we can consider their default values, which are 1.
Using the formula, we can calculate:
FCY = (7.648 GHz) / (1 * 1) = 7.648 GHz
Hence, FCY (clock frequency) is 7.648 GHz.
Now let's determine TCY (clock period):
TCY = 1 / FCY
Substituting the value we obtained for FCY:
TCY = 1 / 7.648 GHz
Converting GHz to Hz:
TCY = 1 / (7.648 x 10^9) s^-1 = 1.304 x 10^-10 seconds
Therefore, TCY (clock period) is approximately 1.304 x 10^-10 seconds.
To calculate the values of FCY (instruction execution frequency) and TCY (instruction execution time), we need to understand how a Phase-Locked Loop (PLL) works.
1. Determine the PLL multiplication factor (M)
- In this case, the primary oscillator frequency is given as 7.648 GHz (Gigahertz).
- The PLL is used to multiply the input frequency, so we need to determine the frequency multiplication factor (M).
- If the M value is not explicitly given, we need further information or assumptions to calculate it accurately.
2. Calculate the Output Frequency of the PLL (Fout)
- Multiply the primary oscillator frequency by the PLL multiplication factor (M).
- Fout = Primary Oscillator Frequency * M
3. Calculate FCY (Instruction Execution Frequency)
- FCY is equal to Fout divided by four (assuming a one-to-four instruction cycle-to-clock ratio).
- FCY = Fout / 4
4. Calculate TCY (Instruction Execution Time)
- TCY is the time it takes to execute one instruction and is equal to the reciprocal of FCY.
- TCY = 1 / FCY
Please provide the value of the PLL multiplication factor (M) or any additional information if available, so we can proceed with the calculation.
are you sure these are correct answers?
Apologies for any confusion caused. In the absence of the PLL multiplication factor (M), it is not possible to accurately determine the values of FCY and TCY. The PLL multiplication factor plays a crucial role in adjusting the primary oscillator frequency and determining the resulting clock frequencies.
To further assist you, please provide any additional information regarding the PLL multiplication factor (M) or the specific system requirements.