Timers And Counters

Timer online with alarm.

Timers and counters.

Tmod is an 8 bit register used for selecting timer or counter and mode of timers. Since the 8051 follows an 8 bit architecture each 16 bit is accessed as two separate registers of low byte and high byte. Lower 4 bits are used for control operation of timer. Create one or multiple timers and start them in any order.

Timer mode control tmod. The 16 bit register of timer 0 is accessed as low and high byte. Set a silent timer clock or choose a sound. In arduino uno it takes 1 16000000 seconds or 62nano seconds to make a single count.

They can be used as timers or as event counters. A timer uses counter which counts at certain speed depending upon the clock frequency. Both timer 0 and timer 1 are 16 bit wide. A timer is an application of the counters where a certain signal with a fixed frequency hence period is counted to record the time.

Counters and timers provide timing and digital i o. Use these products for monitoring quadrature encoders event counting period measurement pulse generation pulse train generation two edge separation measurement and more. The 8051 has two timers timer 0 and timer 1. Counters and timers in 8051 microcontroller contain two special function registers.