What is the duration of reset signals in Microcontroller 8051?

In the 8051 microcontroller, the reset signal duration must be at least 2 machine cycles, which corresponds to a minimum of 24 oscillator periods for proper initialization. This ensures that the microcontroller can properly reset and start executing instructions from the designated reset vector. A typical recommendation is to hold the reset signal active for about 100 milliseconds to ensure reliable operation.