Why 2 grounds in 8086

Search only containers. Search titles only. Search Advanced search…. New posts. Search forums. Log in. Install the app. Contact us. Close Menu. Welcome to EDAboard. To participate you need to register. Registration is free. Click here to register now. Register Log in. JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding. Why are there 2 ground pins in ? How many pins does have? What is microprocessor GND? What is the purpose of Den pin in a processor?

Is GND positive or negative? Is GND 0V? What is a GND wire? What is a 12v negative ground system? Why is ground negative? What does negative ground mean? Is Earth Plus or minus? Where do you ground negative battery cables? Does a 12v battery need to be grounded? Previous Article What are the main causes of learning disability? Next Article Which insurance license makes the most money? Back To Top. If you look at the PIC 16F, you will see that that has two ground and two supply pins.

I can think of two possible reasons: Two connections makes for a lower impedance connection. One connection for each of two different parts of the chip, makes life easier for the guy designing the silicon. I can think of better reasons for the PIC: Analog ground, digital ground The pin for the ratiometric reference ground.

NorthGuy Well-Known Member. JimB said:. Click to expand Because in silicon, its harder. No layers. Wire bonds to anywhere on the chip. No insulated wire though. I did some manual ultrasonic gold wire bonds before. KeepItSimpleStupid said:. How come the guy designing the silicon is more important than the PCB guy? I think you're right JimB.

It's probably down to distributing clean power "across" the chip. Look at something like the i7 series processors, there are in the region of of each supply and ground pins.

Thanks JimB And yeah there are no separate analog and digital grounds. I forget the naming convention but for example the ADC's on some pics have there own supply pin's, even if you use the internal ref etc you still have to power the ADC pins.

Thanks JimB. So I guess I was wrong. Little Ghostman said:. In some ways your right, if the pic had to internally connect from one side to the other, then surely the current available would drop? Not too sure now Ive said it!