Counters and timers in 8051 microcontroller contain two special function registers.
Timers and counters.
They can be used as timers or as event counters.
Timer online with alarm.
Lower 4 bits are used for control operation of timer.
Tmod timer mode register and tcon timer control register which are used for activating and configuring 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.
Create one or multiple timers and start them in any order.
Meaning arduino moves from one instruction to another instruction for every 62 nano second.
The 8051 has two timers timer 0 and timer 1.
Timer mode control tmod.
In arduino uno it takes 1 16000000 seconds or 62nano seconds to make a single count.
Since the 8051 follows an 8 bit architecture each 16 bit is accessed as two separate registers of low byte and high byte.
Both timer 0 and timer 1 are 16 bit wide.
The 16 bit register of timer 0 is accessed as low and high byte.
Counters and timers provide timing and digital i o.
A timer uses counter which counts at certain speed depending upon the clock frequency.
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.