Timers And Counters

A timer is an application of the counters where a certain signal with a fixed frequency hence period is counted to record the time.

Timers and counters.

Tmod timer mode register and tcon timer control register which are used for activating and configuring timers and 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. Counters and timers in 8051 microcontroller contain two special function registers.

In arduino uno it takes 1 16000000 seconds or 62nano seconds to make a single count. Counters and timers provide timing and digital i o. In modern applications counters are based on electronic devices and the counters are sequential logic circuit designed to record the number of electric pulses fed into the counter. Tmod is an 8 bit register used for selecting timer or counter and mode of timers.

Lower 4 bits are used for control operation of timer. The 16 bit register of timer 0 is accessed as low and high byte. Create one or multiple timers and start them in any order. They can be used as timers or as event counters.

Timer online with alarm. Use these products for monitoring quadrature encoders event counting period measurement pulse generation pulse train generation two edge separation measurement and more. Set a silent timer clock or choose a sound. Since the 8051 follows an 8 bit architecture each 16 bit is accessed as two separate registers of low byte and high byte.