What is the difference between counter and timer?

A timer is a specialized type of clock which is used to measure time intervals. A counter is a device that stores (and sometimes displays) the number of times a particular event or process occurred, with respect to a clock signal. It is used to count the events happening outside the microcontroller.

What is timer in PIC microcontroller?

Timer is nothing but a simple binary counter that can be configured to count clock pulses(Internal/External). Once it reaches the Max value, it will roll back to zero setting up an OverFlow flag and generates the interrupt if enabled.

What are the timers of pic 16f877a?

PIC16F877a has three timers.

• Timer0 (8-bit timer)
• Timer1 (16-bit timer)
• Timer2 (8-bit timer)

What is a difference between a timer and a counter in 8051?

A timer uses the frequency of the internal clock, and generates delay. A counter uses an external signal to count pulses.

Why timer is used?

Timers: Timers are used to measure specific time intervals. The timer can be used to measure the time elapsed or the external events occurring for a specific time interval. They are used to maintain the operation of the embedded system in sync with the clock. The clock can be an external clock or the system clock.

What are timers used for?

Timer is a specialized type of clock used for measuring specific time intervals. Timers can be categorized into two main types. A timer that counts upwards from zero for measuring elapsed time is often called a stopwatch, while a device which counts down from a specified time interval is more usually called a timer.

How many timers are there in PIC microcontroller?

The PIC16F877A PIC MCU has three Timer Modules. They are names as Timer0, Timer1 and Timer2. The Timer 0 and Timer 2 are 8-bit Timers and Timer 1 is a 16-bit Timer.

How many timers are there in PIC 18 microcontroller?

– A PIC18 microcontroller may have up to 5 timers: Timer0…Timer 4. – Timer0, Timer1, and Timer3 are 16-bit timers whereas Timer2 and Timer4 are 8-bit. – When a timer rolls over, an interrupt may be generated if it is enabled.

How many timer is present in 16f877a?

three Timer Modules
The PIC16F877A PIC MCU has three Timer Modules. They are names as Timer0, Timer1 and Timer2. The Timer 0 and Timer 2 are 8-bit Timers and Timer 1 is a 16-bit Timer.

Which timer is not available as counter?

When the Timer0 is working in mode 3, the TL0 will be used as an 8-bit timer/counter. It will be controlled by the standard Timer0 control bits, T0 and INT0 inputs. The TH0 is used as an 8-bit timer but not the counter. This is controlled by Timer1 Control bit TR1.

What is difference between timer and counter in PLC?

The timers and counters are used in a PLC for its continuous operation so they are inevitable in a PLC. The timer would time up to the value set by the user and the counter will count up to the value set by the user. Both the timer and counter would function as output instructions in a PLC program.

What is the function of timer in 8051 microcontroller?

Timer in 8051 Their main purpose is to measure time and count external events. Besides, they are used for generating clock pulses that can be used in serial communication, so-called Baud Rate.