If a Crystal of 4 MHz is connected to X1 and X2 pins of 8085, what will be frequency at Clk Out

To determine the frequency at Clk Out when a crystal of 4 MHz is connected to the X1 and X2 pins of the 8085, we need to consider the internal circuitry of the 8085 microprocessor.

1. The crystal is connected to the X1 and X2 pins, which are the input pins for the external clock signal.
2. The crystal acts as an oscillator, generating a stable clock signal with a frequency of 4 MHz.
3. The 8085 microprocessor has an internal circuitry that divides the input clock signal by 2 to generate the internal clock signal.
4. Therefore, the frequency at Clk Out will be half of the input clock frequency, which is 2 MHz.

In summary, when a crystal of 4 MHz is connected to the X1 and X2 pins of the 8085 microprocessor, the frequency at Clk Out will be 2 MHz.