An embedded C program is used to generate the square waveform using timer 0 in mode 2. The TH0 is loaded with 48h. What is the frequency of the square waveform.

To calculate the frequency of the square waveform, we need to understand how the timer works in an embedded C program.

1. Timer 0 in mode 2 is an 8-bit auto-reload mode. This means that the timer will count from the value in TH0 to 255 (0xFF), overflow, and then automatically reload the value in TH0 and start counting again.

2. The time for one cycle of the timer is determined by the oscillator frequency (which we'll call F_osc) and the timer's prescaler. For a standard 8051 microcontroller, the prescaler is 12, so the time for one cycle is (256 - TH0) * 12 / F_osc.

3. The square waveform is generated by toggling an output pin every time the timer overflows. This means that the period of the waveform is twice the time for one cycle of the timer, and the frequency is the reciprocal of the period.

4. In this case, TH0 is loaded with 0x48, which is 72 in decimal. So the time for one cycle of the timer is (256 - 72) * 12 / F_osc = 184 * 12 / F_osc.

5. Therefore, the frequency of the square waveform is F_osc / (2 * 184 * 12) = F_osc / 4416.

Without knowing the value of F_osc, we can't calculate a specific frequency. However, if we know F_osc, we can substitute it into the formula to get the frequency. For example, if F