answersLogoWhite

0

Only port 0 needs pull-up resistors to be connected externally if you want to use it as out put port, because it has no in built pull up circuit so it can't give +5v as out put. refer micro controller and applications book by mahmed ali mazidi.

User Avatar

Wiki User

12y ago

What else can I help you with?

Continue Learning about Electrical Engineering

Difference between 89s51 and 89c51?

Difference Between the 89C51 Micro-controllers and 89S51Following are the main differences between 89S51/S52 and 89C51/C52In S series the main difference is that you can program the "S" verison through ISP (in application) or using very simple programmers, while the "C" version still needs "full" parallel programmer . Where ISP stands for In System Programming89s51 has more new feature than 89c51 such as Watchdog Timers 51 is more cheaper than c 51 . if you want to use the application for longtime better use c 51 .


How do you use a multimeter to measure the current in a lemon?

You will need to add an anode and cathode, such as a penny and a nickel. Then add a load resister and use an amp meter to measure current flow, which will change depending on resistance. Measuring the potential current would prove more difficult.


How many bends in a conduit run would be required before the use of a pull box?

There has to be a pull box between every four quarter bends in a conduit run.


What combinations of bends in a conduit run require the use of a pull box?

Code states no more that 4 - 90 degree bends in a conduit run between pull boxes.


How do you install conduit on pull box?

To install conduit on a pull box, first ensure the pull box is properly positioned and secured. Next, cut the conduit to the required length and deburr the edges. Use appropriate fittings to connect the conduit to the pull box, ensuring they are tight and secure. Finally, seal any openings to prevent moisture and debris from entering the box.

Related Questions

Why use AT89C51 but not others?

89c51 microcontroller is of the series of 8051,one of oldest yet commonly used microcontroller.89c51 have the less complex features then other microcontroller and it is also easily available and cheap in comparison of other microcontrollers.


Difference between 89s51 and 89c51?

Difference Between the 89C51 Micro-controllers and 89S51Following are the main differences between 89S51/S52 and 89C51/C52In S series the main difference is that you can program the "S" verison through ISP (in application) or using very simple programmers, while the "C" version still needs "full" parallel programmer . Where ISP stands for In System Programming89s51 has more new feature than 89c51 such as Watchdog Timers 51 is more cheaper than c 51 . if you want to use the application for longtime better use c 51 .


Blower motor only works on hi speed 01 ranger 3.0?

Most likely the resister is burnt out. When you use less than full blower, the blower speed switch shunts the 12v power though a resister to drop the voltage to the blower motor, slowing the blower speed. When the multi-speed resister is burnt out, it is, 'open circuited'. So no electricity can pass though to the blower. When the blower switch is on 'full', the resister is bypassed, allowing full power to the fan motor for maximum speed. It should be located under that dashboard in most vehicles. Just trace the wires from the switch to the resister. Warning: a working resister can get very hot when power is going though it.


How do you change a blower resister on a 2000 Chrysler Sebring JXI?

Behind the glovebox there is one panel to remove, then use a small socket to remove the two screws holding in the fan resister card and connector. You will need to lay on your back to do this using a light source.


When you pick up a bag of shoopping are you using a push or pull?

We use a pull.


Is there a resister on a 05 primera?

There are hundreds, maybe thousands of them. But I think you mean a particular type and use. Unfortunately I need more info to answer that question.


How do you use pull factors in a sentence?

The Pull factor pull factored the pull factor.


What would be the best size for resister?

Electronic resistors differ from equipment to equipment. Without prior knowledge of the equipment you intend to use resistor for, it can't be answered.


What do you use to push or pull an object?

we use force


What is the DC current running through an 18 ohm resister at 90 volts?

5 amps. Use Ohm's Law: I = V/R = 90/18 = 5


How do you use a shotgun?

Pull the trigger


What do you use to pull out a dodge?

A wench