# What is frequency of timer if clock is used as clock source?

Contents

What is the frequency of the clock that is being used as the clock source for the timer? Explanation: The frequency of the clock source for the timer is equal to f/12(where f is the frequency of the crystal).

## What is the timer period for the 12 MHz clock frequency?

256 microseconds is the maximum delay generated by the 12 MHz clock frequency in accordance to an auto-reload mode (Mode 2 ) operation of the timer.

## What is the clock source for the timers in 8051?

The internal circuitry in the 8051 microcontrollers provides a clock source to the timers which is 1/12th of the frequency of crystal attached to the microcontroller, also called Machine cycle frequency.

## What is the clock source for the timer Mcq?

What is the clock source for the timers? Solution: Timer’s clock source is the crystal that is applied to the controller.

## What is the maximum delay that can be generated with the crystal frequency of 12MHz?

If interrupt is not used, then we have to check the timer flag (TF) is set using some conditional branching instruction. Maximum delay possible using a single 8051 timer is 65536µS and minimum is 1µS provided that you are using a 12MHz crystal for clocking the microcontroller.

## What is the frequency of a clock?

Its reciprocal, fc = 1/Tc, is the clock frequency. All else being the same, increasing the clock frequency increases the work that a digital system can accomplish per unit time. Frequency is measured in units of Hertz (Hz), or cycles per second: 1 megahertz (MHz) = 106 Hz, and 1 gigahertz (GHz) = 109 Hz.

## What is the standard clock frequency?

Common standard frequency, common reference clock; binary multiple of 100 kHz (128×100 kHz), 50 kHz, 25 kHz, 12.5 kHz. Commonly available as TCXO and OCXO.

## What is the clock source for?

The purpose of the clock source is to provide a timeline for the system that tells you where you are in time. For example issuing the command ‘date’ on a Linux system will eventually read the clock source to determine exactly what time it is.

## Which clock is used as input to timer?

Hardware timers are clocked by the instruction clock, or used to count input pulses.

## What is the timer on a clock?

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.

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## What is the clock frequency of 8087 Mcq?

Computer Science Engineering (CSE) Question

Explanation: 8087 have 5 MHz as its clock frequency because the coprocessor must have the same clock frequency as that of the main processor.

## What is the time period of clock #20 clock clock Mcq?

∴ The correct time is 9 hrs.

## What is the time taken by machine cycle if crystal frequency?

Discussion Forum

Que. What is the time taken by one machine cycle if crystal frequency is 20MHz?
b. 0.60 micro seconds
c. 0.75 micro seconds
d. 1 micro seconds