| Author |
Message |
Yef
Guest
|
 Posted:
Mon Feb 21, 2005 11:15 pm Post subject:
fastest CPU in DIP format? |
|
|
Hi all,
I'm looking for an over-the-counter microprocessor
to run Linux on. However I want to be able to construct
the circuitry myself, so I will need a CPU that is
in a package that mere mortals can work with. My assumption
is that that would be a dual-inline package since that's
what I've used in the past. But when I look at the Jameco
and JDR catalogs I see just slow 8-bit CPUs. Can anyone
point me to something more interesting, such as an
system on a DIP chip type of thing?
Thanks.
|
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Ken Smith
Guest
|
| Posted:
Mon Feb 21, 2005 11:15 pm Post subject:
Re: fastest CPU in DIP format? |
|
|
In article <cvd9dd025du@news4.newsguy.com>,
Chris Carlen <crcarle@BOGUS.sandia.gov> wrote:
[....]
| Quote: | CPUs capable of running Linux will almost certainly all be QFPs or
worse. Actually QFPs are not so bad, and you can indeed solder them by
hand. Oddly enough, even with a rather blunt tip iron suitable for
typical "medium duty" soldering (like a 1/16" wide chisel tip).
|
Just for that, I should port Linux to an 8051. :>
You can also get the solder paste and heat gun type soldering stations for
prices mere mortals can handle if you look for used stuff.
A dental pick made out of materal that solder hates like 316 stainless is
a handy tool to have. You use it to break the surface tension on solder
bridges.
--
--
kensmith@rahul.net forging knowledge |
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Ken Smith
Guest
|
| Posted:
Mon Feb 21, 2005 11:15 pm Post subject:
Re: fastest CPU in DIP format? |
|
|
In article <1109020303.142151.127260@c13g2000cwb.googlegroups.com>,
Yef <e97y@yahoo.com> wrote:
[...]
| Quote: | I need this thing to be very rugged. The device will get
banged up quite a bit and I'm a little concerned that
these new 4-layer or whatever PC boards can't take shocks.
That's the other reason why I was hoping for a DIP package
since their pins are thick.
Does anyone have any thoughts on this?
|
Ease of damage from bumping about:
Worst:
Lead acid batteries (the second ones you buy)
Cheap (sheet metal pin) sockets
Mechanical switches that are hard mounted to the case
Relays
Cheap connectors
More expensive connectors
Large value ceramic capacitors
Improperly installed radial leaded parts.
Trim pots of any kind.
Good quality PLCC sockets
Machined pin sockets.
SMT ICs of nearly any type
:Best
--
--
kensmith@rahul.net forging knowledge
|
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Spehro Pefhany
Guest
|
| Posted:
Mon Feb 21, 2005 11:33 pm Post subject:
Re: fastest CPU in DIP format? |
|
|
On 21 Feb 2005 09:15:27 -0800, the renowned "Yef" <e97y@yahoo.com>
wrote:
| Quote: | Hi all,
I'm looking for an over-the-counter microprocessor
to run Linux on. However I want to be able to construct
the circuitry myself, so I will need a CPU that is
in a package that mere mortals can work with. My assumption
is that that would be a dual-inline package since that's
what I've used in the past. But when I look at the Jameco
and JDR catalogs I see just slow 8-bit CPUs. Can anyone
point me to something more interesting, such as an
system on a DIP chip type of thing?
Thanks.
|
Maybe you should buy a board.
Best regards,
Spehro Pefhany
--
"it's the network..." "The Journey is the reward"
speff@interlog.com Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog Info for designers: http://www.speff.com |
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Tim Wescott
Guest
|
| Posted:
Mon Feb 21, 2005 11:50 pm Post subject:
Re: fastest CPU in DIP format? |
|
|
Yef wrote:
| Quote: | Hi all,
I'm looking for an over-the-counter microprocessor
to run Linux on. However I want to be able to construct
the circuitry myself, so I will need a CPU that is
in a package that mere mortals can work with. My assumption
is that that would be a dual-inline package since that's
what I've used in the past. But when I look at the Jameco
and JDR catalogs I see just slow 8-bit CPUs. Can anyone
point me to something more interesting, such as an
system on a DIP chip type of thing?
Mere mortals can solder gull-wing chips onto boards, even when they're |
at fairly fine pitch. There's enough short-run PC board houses out
there that you have no excuse not to lay out a board and use that.
But I agree with Sperho -- find an eval board (there's a gazillion ARM
eval boards out there) that has the features you want and use that.
Eval boards usually have headers full of undedicated contacts that you
can use for your own circuitry. A very nice way to make a prototype, or
even a one-off product is to get an evaluation board and plug it into
your interface circuitry & use the stack as if it were a finished product.
--
Tim Wescott
Wescott Design Services
http://www.wescottdesign.com |
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Guy Macon
Guest
|
| Posted:
Tue Feb 22, 2005 12:11 am Post subject:
Re: fastest CPU in DIP format? |
|
|
Yef wrote:
| Quote: | I'm looking for an over-the-counter microprocessor
to run Linux on. However I want to be able to construct
the circuitry myself, so I will need a CPU that is
in a package that mere mortals can work with. My assumption
is that that would be a dual-inline package since that's
what I've used in the past. But when I look at the Jameco
and JDR catalogs I see just slow 8-bit CPUs. Can anyone
point me to something more interesting, such as an
system on a DIP chip type of thing?
|
Use a surface mount to through-hole adapter. You can buy one premade
See http://www.accutekmicro.com/press_details.cfm?Press_ID=18 or
http://www.freescale.com/webapp/sps/site/overview.jsp?nodeId=016246TQmY0589
but if you design your own you can have the board house install the
micro and some surface mount bypass caps, and maybe a xtal or a
buffer chip. |
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|
|
Chris Carlen
Guest
|
| Posted:
Tue Feb 22, 2005 12:31 am Post subject:
Re: fastest CPU in DIP format? |
|
|
Yef wrote:
| Quote: | Hi all,
I'm looking for an over-the-counter microprocessor
to run Linux on. However I want to be able to construct
the circuitry myself, so I will need a CPU that is
in a package that mere mortals can work with. My assumption
is that that would be a dual-inline package since that's
what I've used in the past. But when I look at the Jameco
and JDR catalogs I see just slow 8-bit CPUs. Can anyone
point me to something more interesting, such as an
system on a DIP chip type of thing?
Thanks.
|
If you want to run Linux, then you don't want to develop a board. Buy a
ready made single board computer (SBC). If you really want to develop
a microprocessor board, then that's different.
CPUs capable of running Linux will almost certainly all be QFPs or
worse. Actually QFPs are not so bad, and you can indeed solder them by
hand. Oddly enough, even with a rather blunt tip iron suitable for
typical "medium duty" soldering (like a 1/16" wide chisel tip).
So don't be put off by packages! I used to dread SMT, but now it's nothing.
Good day!
--
_______________________________________________________________________
Christopher R. Carlen
Principal Laser/Optical Technologist
Sandia National Laboratories CA USA
crcarle@sandia.gov -- NOTE: Remove "BOGUS" from email address to reply. |
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Yef
Guest
|
| Posted:
Tue Feb 22, 2005 3:11 am Post subject:
Re: fastest CPU in DIP format? |
|
|
Chris Carlen wrote:
| Quote: | CPUs capable of running Linux will almost certainly all be QFPs or
worse. Actually QFPs are not so bad, and you can indeed solder them
by
hand. Oddly enough, even with a rather blunt tip iron suitable for
typical "medium duty" soldering (like a 1/16" wide chisel tip).
So don't be put off by packages! I used to dread SMT, but now it's
nothing. |
Actually I should have added something but I forgot:
I need this thing to be very rugged. The device will get
banged up quite a bit and I'm a little concerned that
these new 4-layer or whatever PC boards can't take shocks.
That's the other reason why I was hoping for a DIP package
since their pins are thick.
Does anyone have any thoughts on this?
Thanks. |
|
| Back to top |
|
|
Chris Carlen
Guest
|
| Posted:
Tue Feb 22, 2005 3:29 am Post subject:
Re: fastest CPU in DIP format? |
|
|
Yef wrote:
| Quote: | Chris Carlen wrote:
CPUs capable of running Linux will almost certainly all be QFPs or
worse. Actually QFPs are not so bad, and you can indeed solder them
by
hand. Oddly enough, even with a rather blunt tip iron suitable for
typical "medium duty" soldering (like a 1/16" wide chisel tip).
So don't be put off by packages! I used to dread SMT, but now it's
nothing.
Actually I should have added something but I forgot:
I need this thing to be very rugged. The device will get
banged up quite a bit and I'm a little concerned that
these new 4-layer or whatever PC boards can't take shocks.
That's the other reason why I was hoping for a DIP package
since their pins are thick.
Does anyone have any thoughts on this?
|
Start a thread on DIP vs. SMT shock/vibration robustness.
--
_______________________________________________________________________
Christopher R. Carlen
Principal Laser/Optical Technologist
Sandia National Laboratories CA USA
crcarle@sandia.gov -- NOTE: Remove "BOGUS" from email address to reply. |
|
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|
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Guy Macon
Guest
|
| Posted:
Tue Feb 22, 2005 3:30 am Post subject:
Re: fastest CPU in DIP format? |
|
|
Yef wrote:
| Quote: | I need this thing to be very rugged. The device will get
banged up quite a bit and I'm a little concerned that
these new 4-layer or whatever PC boards can't take shocks.
That's the other reason why I was hoping for a DIP package
since their pins are thick.
Does anyone have any thoughts on this?
|
I hope that you won't take this the wrong way, but my thoughts
are that you need to learn a lot more about designing rugged
electronics. Your belief that 4 layer boards and SMT parts
can't take shock/vibration is unfounded. |
|
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|
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Boris Mohar
Guest
|
| Posted:
Tue Feb 22, 2005 3:39 am Post subject:
Re: fastest CPU in DIP format? |
|
|
On 21 Feb 2005 13:11:43 -0800, "Yef" <e97y@yahoo.com> wrote:
| Quote: |
Chris Carlen wrote:
CPUs capable of running Linux will almost certainly all be QFPs or
worse. Actually QFPs are not so bad, and you can indeed solder them
by
hand. Oddly enough, even with a rather blunt tip iron suitable for
typical "medium duty" soldering (like a 1/16" wide chisel tip).
So don't be put off by packages! I used to dread SMT, but now it's
nothing.
Actually I should have added something but I forgot:
I need this thing to be very rugged. The device will get
banged up quite a bit and I'm a little concerned that
these new 4-layer or whatever PC boards can't take shocks.
That's the other reason why I was hoping for a DIP package
since their pins are thick.
Does anyone have any thoughts on this?
Thanks.
|
Pins are thick because the package is large. Four layer boards are not new.
Are planning to shoot this out of the cannon? How many gees does it have to
endure?
--
Boris Mohar |
|
| Back to top |
|
|
Pooh Bear
Guest
|
| Posted:
Tue Feb 22, 2005 3:40 am Post subject:
Re: fastest CPU in DIP format? |
|
|
Chris Carlen wrote:
| Quote: | Yef wrote:
Hi all,
I'm looking for an over-the-counter microprocessor
to run Linux on. However I want to be able to construct
the circuitry myself, so I will need a CPU that is
in a package that mere mortals can work with. My assumption
is that that would be a dual-inline package since that's
what I've used in the past. But when I look at the Jameco
and JDR catalogs I see just slow 8-bit CPUs. Can anyone
point me to something more interesting, such as an
system on a DIP chip type of thing?
Thanks.
If you want to run Linux, then you don't want to develop a board. Buy a
ready made single board computer (SBC). If you really want to develop
a microprocessor board, then that's different.
CPUs capable of running Linux will almost certainly all be QFPs or
worse. Actually QFPs are not so bad, and you can indeed solder them by
hand. Oddly enough, even with a rather blunt tip iron suitable for
typical "medium duty" soldering (like a 1/16" wide chisel tip).
So don't be put off by packages! I used to dread SMT, but now it's nothing.
|
Been re-working some SMD today actually. Fiddly but do-able with even just a
Weller TCP iron plus fine tip.
Socket manufacturers like 3M, Augat etc do provide some sockets that take PLCC
parts typically but convert them to through hole leadouts. I have my doubts that
there'll be one with enough pins for a modern PC type CPU though.
Graham |
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|
|
Pooh Bear
Guest
|
| Posted:
Tue Feb 22, 2005 3:42 am Post subject:
Re: fastest CPU in DIP format? |
|
|
Yef wrote:
| Quote: | Chris Carlen wrote:
CPUs capable of running Linux will almost certainly all be QFPs or
worse. Actually QFPs are not so bad, and you can indeed solder them
by
hand. Oddly enough, even with a rather blunt tip iron suitable for
typical "medium duty" soldering (like a 1/16" wide chisel tip).
So don't be put off by packages! I used to dread SMT, but now it's
nothing.
Actually I should have added something but I forgot:
I need this thing to be very rugged. The device will get
banged up quite a bit and I'm a little concerned that
these new 4-layer or whatever PC boards can't take shocks.
That's the other reason why I was hoping for a DIP package
since their pins are thick.
Does anyone have any thoughts on this?
|
SMD packages weigh less so are less bothered about 'rough handling'.
Check out PC104 format boards for an embedded application. They're meant
for industrial use.
Graham |
|
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|
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Rich Grise
Guest
|
| Posted:
Tue Feb 22, 2005 6:11 am Post subject:
Re: fastest CPU in DIP format? |
|
|
On Mon, 21 Feb 2005 09:15:27 -0800, Yef wrote:
| Quote: | Hi all,
I'm looking for an over-the-counter microprocessor
to run Linux on. However I want to be able to construct
the circuitry myself, so I will need a CPU that is
in a package that mere mortals can work with. My assumption
is that that would be a dual-inline package since that's
what I've used in the past. But when I look at the Jameco
and JDR catalogs I see just slow 8-bit CPUs. Can anyone
point me to something more interesting, such as an
system on a DIP chip type of thing?
80186. |
Cheers!
Rich |
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|
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Pooh Bear
Guest
|
| Posted:
Tue Feb 22, 2005 6:11 am Post subject:
Re: fastest CPU in DIP format? |
|
|
Rich Grise wrote:
| Quote: | On Mon, 21 Feb 2005 09:15:27 -0800, Yef wrote:
Hi all,
I'm looking for an over-the-counter microprocessor
to run Linux on. However I want to be able to construct
the circuitry myself, so I will need a CPU that is
in a package that mere mortals can work with. My assumption
is that that would be a dual-inline package since that's
what I've used in the past. But when I look at the Jameco
and JDR catalogs I see just slow 8-bit CPUs. Can anyone
point me to something more interesting, such as an
system on a DIP chip type of thing?
80186.
Cheers!
Rich
|
I was waiting for someone to say that !
Wasn't the 80286 in DIP too ? Bah - I've only got Volume II of Intel
Microprocessors 1991 manual ! I need Volume I to tell.
Graham |
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