The primary oscillator frequency on explorer 16 is 14.535 MHZ. PLL is used. What is the instruction cycle frequency (Fcy)?
To calculate the instruction cycle frequency (Fcy), we need to determine the frequency after the PLL is applied.
The Explorer 16 development board uses a PLL (Phase-Locked Loop) to multiply the primary oscillator frequency by a certain factor. The PLL can multiply the frequency by either 4x, 8x, or 16x, depending on the settings.
Assuming the PLL is set to multiply the frequency by 16x, the formula to calculate the instruction cycle frequency (Fcy) is:
Fcy = Primary Oscillator Frequency * PLL Multiplier / 4
Fcy = 14.535 MHz * 16 / 4
Fcy = 58.14 MHz
Therefore, the instruction cycle frequency (Fcy) is 58.14 MHz.
To calculate the instruction cycle frequency (Fcy), we need to know the PLL (Phase-Locked Loop) multiplier/divisor values.
Given that the primary oscillator frequency on Explorer 16 is 14.535 MHz, we'll assume that the PLL is being used to increase this frequency.
Assuming the PLL multiplier (N2) and divisor (N1) values are provided, we can use the following formula to calculate Fcy:
Fcy = (Primary oscillator frequency * N2) / N1
Please provide the values for N2 and N1, or if they are not provided, please specify so I can help accordingly.
To calculate the instruction cycle frequency (Fcy), we need to understand how the PLL works and its impact on the frequency.
The Explorer 16 board uses a Phase-Locked Loop (PLL) to multiply the primary oscillator frequency and generate the instruction cycle frequency. The PLL multiplies the input frequency by a fixed or programmable factor to obtain the desired output frequency.
Here are the steps to calculate the instruction cycle frequency:
1. Determine the PLL multiplication factor: Check the specifications or documentation for the Explorer 16 board to find the PLL multiplication factor. This factor is determined by the specific microcontroller or oscillator circuit used on the board.
2. Multiply the primary oscillator frequency by the PLL factor: Use the multiplication factor obtained in step 1 to multiply the primary oscillator frequency (14.535 MHz) and calculate the PLL output frequency. Let's call this frequency PLL_out.
3. Calculate the instruction cycle frequency (Fcy): The instruction cycle frequency is the reciprocal of the time taken for one instruction cycle. It can be calculated using the following formula:
Fcy = PLL_out / 4
Dividing PLL_out by 4 gives the instruction cycle frequency because most PIC microcontrollers have a 4:1 prescaler. This means that four clock cycles are needed for one instruction cycle.
In your case, since you did not provide the PLL multiplication factor, you would need to consult the documentation or specifications of the Explorer 16 board or the microcontroller used to find the specific factor. Once you have the multiplication factor, follow the steps mentioned above to calculate the instruction cycle frequency (Fcy).
Note: It is worth mentioning that the specific implementation and configuration of the PLL circuitry may differ depending on the microcontroller or oscillator used on the Explorer 16 board.