As others said, it is probably due to the circuitry inside the chip. Try
taking a simple circuit and drawing it out on a piece of paper. It is very
difficult to draw it so that no lines cross, and on a printed circuit, they
*can't* cross. That is why complex circuits are done on multiple layer
boards, like a PC motherboard. So it may well be for this reason.
There are also design considerations that make it wise to use more than one
ground to prevent interference with some devices. These are engineering
issues that I don't know enough to describe, but they exist.
Jonathan
www.madlabs.info
Original Message
From: "rme90" <rme90@y...>
To: <basicstamps@yahoogroups.com>
Sent: Friday, July 04, 2003 12:37 PM
Subject: [noparse][[/noparse]basicstamps] Jonathan im talking about BS2p
> can u explain this to me???about 2 pins for ground???
>
>
> Thx Romero
>
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As others have pointed out, it's just for convenience since the serial
connection (which requires ground) is on one side of the chip and the
power connections (which also require a ground reference) are on the
other. As you gain more experience you will find that many devices have
multiple pins that serve the same purpose (and are internally
connected).
can u explain this to me???about 2 pins for ground???
Thx Romero
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Comments
As others said, it is probably due to the circuitry inside the chip. Try
taking a simple circuit and drawing it out on a piece of paper. It is very
difficult to draw it so that no lines cross, and on a printed circuit, they
*can't* cross. That is why complex circuits are done on multiple layer
boards, like a PC motherboard. So it may well be for this reason.
There are also design considerations that make it wise to use more than one
ground to prevent interference with some devices. These are engineering
issues that I don't know enough to describe, but they exist.
Jonathan
www.madlabs.info
Original Message
From: "rme90" <rme90@y...>
To: <basicstamps@yahoogroups.com>
Sent: Friday, July 04, 2003 12:37 PM
Subject: [noparse][[/noparse]basicstamps] Jonathan im talking about BS2p
> can u explain this to me???about 2 pins for ground???
>
>
> Thx Romero
>
>
> To UNSUBSCRIBE, just send mail to:
> basicstamps-unsubscribe@yahoogroups.com
> from the same email address that you subscribed. Text in the Subject and
Body of the message will be ignored.
>
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>
>
>
>
>
connection (which requires ground) is on one side of the chip and the
power connections (which also require a ground reference) are on the
other. As you gain more experience you will find that many devices have
multiple pins that serve the same purpose (and are internally
connected).
-- Jon Williams
-- Parallax
Original Message
From: rme90 [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=ysIYJEJWHrbCCGd29u7Zx04OTgxzX8d2uwouXeALnE8P4H1Ahm14FUbiXXFm3jqPgKJXFciY]rme90@y...[/url
Sent: Friday, July 04, 2003 2:38 PM
To: basicstamps@yahoogroups.com
Subject: [noparse][[/noparse]basicstamps] Jonathan im talking about BS2p
can u explain this to me???about 2 pins for ground???
Thx Romero
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