Which of the following pins is connected to the frequency generator in an 8085 microprocessor? A) Pin1 and 2 B) Pin 20 and 40 C) Pin 1 and 40 D) Pin 21 and 22

To determine which pins are connected to the frequency generator in an 8085 microprocessor, we need to analyze the pin configuration of the 8085.

1. Understanding the 8085 Microprocessor Pin Configuration

The 8085 microprocessor has a total of 40 pins, each with specific functions. Among these, certain pins are involved in generating timings and controlling signals.

2. Identifying Relevant Pins

The frequency generation in the 8085 is primarily associated with the oscillator circuit, which is linked to specific pins:

• Pin 1 (Vcc) - Power Supply
• Pin 2 (Vss) - Ground
• Pin 21 (ALE) - Address Latch Enable
• Pin 22 (IO/M) - Input/Output Memory
• Other pins like Pin 20 and Pin 40 have functions related to control signals.

3. Analyzing the Options

From the options provided:

• A) Pin 1 and 2 - Power and ground, not related to frequency.
• B) Pin 20 and 40 - Not related to frequency generation.
• C) Pin 1 and 40 - Not related.
• D) Pin 21 and 22 - These pins are relevant as they relate to input/output control and address latching, tied into the operational timing.

4. Conclusion

The correct answer, based on analysis, is D) Pin 21 and 22 as these pins are involved in controlling aspects related to the frequency operations of the microprocessor.