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PICList Thread
'[PIC]: PIC18F8720 TQFP package.'
2003\04\10@042809 by Mike Singer

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  Folks, this week we discussed a project with a lot of input-outputs. Possible ways were: PIC18F, AVR, MSP430. I battled for PICs, cause I'd like to have a reason to go on with PICList (the only reason).

  It was a tough task, guys, but I almost succeeded. (I used an old good soviet style propaganda trick: I asked which horse power he would prefer: 48 (max number of i/o lines in AVR and MSP430) or 68 (number of i/o lines in PIC18F8720). So Mchip has won:-) The problem remained to solve was TQFP package.

  We emailed local Mchip guys with question if they
have some adapter (a little PCB we could solder PIC18F8720 to, for example, or something else).
When developing project we'll change application PCB many times and also microcontroller will be replaced to get statistic. We wrote we bought and successfully used a number of DIP PICs earlier.

  Am I stupid as rock?
  In response we've got absolutely irrelevant nice little message with 700K 39583b.pdf attachment.
They told us we needn't adapter, we must place five
jumpers onto PCB (5v,13v,data,strobe,ground)to program the chip.
  Didn't I told them we bought their PICs ealier?      And this 13v for HVP for 68 i/o 80 pins PIC18F8720?

  And this unnecessary 700K 39583b.pdf attachment,
because we've downloaded it before? Unsolicited
700K during day-time with our phone lines here in
Ukraine was a pain.
  The question about AVR and MSP got up again.
Should I fight for PICs now?

 Could anybody tell me what is the common approach
to handle 80 pin TQFP package when developing project?

Thanks in advance.

Mike Singer.


The guy who sent me the attachment: ---------------------
ó Õ×ÁÖÅÎÉÅÍ,  áÎÔÏÎ ëÕÚÎÅÃÏ×
ôÅÈÎÉÞÅÓËÉÊ ÃÅÎÔÒ MICROCHIP ÔÅÌ. +38-044-295-55-19
spam_OUTantonTakeThisOuTspammicrochip.com.ua
http://www.microchip.com.ua
----------------------



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2003\04\10@105519 by M. Adam Davis

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I /just/ got  some prototyping boards to adapt surface mount ICs from
jameco, made by http://www.beldynesys.com/ .

The board I got is panellized several types of adaptors, and includes
TQFP80 in the following mm pin sizes:  0.65mm, 0.5mm, 0.4mm

It also includes a few other qfp80 sizes, etc.

This is board #504 (they sell a variety of these boards).  I'm using the
TQFP100 0.5mm to solder some LCD flat ribbon connectors (24 pin, 0.5mm
pitch) for a spiffy touchscreen 320x240 monochrome lcd panel from
earthlcd (only $39US).

Anyway, I hope this is useful.

-Adam

Mike Singer wrote:

{Quote hidden}

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2003\04\10@115546 by erholm (QAC)

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www.beldynesys.com/ gives me "Unresolved hostname"

Jan-Erik Soderholm.

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2003\04\10@122115 by Timothy Box

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Hi

Development work I am currently doing with a PIC18F8720 is on a PICProto80
board from Melabs http://www.melabs.com/products/picproto/40+pproto.htm its
well made and reasonably priced.

There are a number of other boards around for mounting 80 pin TQFP packages
but as this has all the power supply etc built onto it as well as numbering
I took the easy route.


Others to look at

www.rswww.com/cgi-bin/bv/browse/Module.jsp?BV_SessionID=@@@@156134903
7.1049991178@@@@&BV_EngineID=cccdadchmiellmicfngcfkmdgkldfhl.0&3227444076=32
27444076&catoid=-93801151


http://www.compsys1.com/workbench/


Tim

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2003\04\10@135331 by Marc Joffe
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part 1 3971 bytes content-type:text/plain; charset=UTF-8 (decoded quoted-printable)

Hi Mike,

I have just developed a board that solves problems like yours. I am willing to sell them to PicList members before I start selling them on a
website. The price is USD $24.95 per board with presoldered pic 18F8720
or three boards can be purchased for USD $12.95 without attached
microcontrollers (the three caps mentioned below are included in both
setups).

The solution is a simple adapter board, visible in attached image, which
supports both 64 and 80 pin Microchip 18F controllers. The board
contains a 0.1uF decoupling cap and 18pF caps for a crystal (crystal not
included).


The board also has all Vdds and Vsss connected together. Also, Avss is
connected to Vss via a solder bridge and AVdd is connected to Vdd via a
solder bridge. Should you desire, these two solder bridges can easily be
removed.

To integrate with your project the board contains four 2x10 headers
(pins not included for these headers as some people use pins and others
solder wires on).

The last feature is an included ICSP port to make programming a simple
task (pins not included). The ICSP port includes a pin for low voltage
programming.

For anyone with further questions please feel free to email off of the
list.

Thanks,
Marc Joffe


On Thu, 2003-04-10 at 03:26, Mike Singer wrote:
{Quote hidden}

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part 2 9637 bytes content-type:image/jpeg; name="board image2.jpg" (decode)


part 3 2 bytes
-

2003\04\10@140207 by D. Jay Newman

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> I have just developed a board that solves problems like yours. I am=20
> willing to sell them to PicList members before I start selling them on a
> website. The price is USD $24.95 per board with presoldered pic 18F8720
> or three boards can be purchased for USD $12.95 without attached
> microcontrollers (the three caps mentioned below are included in both
> setups).

I would be very interested in such board(s), however, I can't find your
email address to discuss this off-line...
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D. Jay Newman          ! Pudge controls the weather.
TakeThisOuTjayEraseMEspamspam_OUTsprucegrove.com    !
http://enerd.ws/~jay/  ! Oh good. My dog found the chainsaw.

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2003\04\10@141206 by Marc Joffe

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You can email me at

marcjoffe at yahoo.ca (sorry about the format, just trying to prevent
spam)

Also, I forgot to mention that discounts are available for larger
quantities.

Thanks,
Marc

On Thu, 2003-04-10 at 13:59, D. Jay Newman wrote:
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2003\04\10@182330 by M. Adam Davis

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Sorry.  Should be http://www.beldynsys.com/

Jameco says:
http://www.jameco.com/cgi-bin/ncommerce3/ExecMacro/jameco/searchResult.d2w/report?sort=BKW&search=b504&Go.x=0&Go.y=0

But I didn't realise they were nearly $50 per panel.  They are cheaper
directly from Bellin, apparently.  I didn't do the ordering on this one
- I said, "I need", and they said, "How many?"

-Adam

Jan-erik Soderholm (QAC) wrote:

{Quote hidden}

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2003\04\10@212933 by Mike Singer

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Thanks Adam, Tim, Marc for the good starting
point to developing with TQFP package.

Mike Singer.

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