What is the difference between timer and counter in microcontrollers?

Answer 1

timer uses internal clock frequency, and generates delay

counter uses external signal to count pulses...

Timer

*the register incremented for every machine cycle.

*maximum count rate is 1/12 of oscillator frequency.

Counter

*The register is incremented in response to a 1- to -0 transition at its corresponding to external input pin(T0,T1).

*maximum count rate is 1/24 of oscillator frequency.

*External I/P signal must be kept at least for one machine cycle