Searching \ for '[EE]: FAST Low-Cost Programmer for 24LC256 I2C EEP' in subject line. ()
Make payments with PayPal - it's fast, free and secure! Help us get a faster server
FAQ page: www.piclist.com/techref/microchip/devprogs.htm?key=programmer
Search entire site for: 'FAST Low-Cost Programmer for 24LC256 I2C EEP'.

Exact match. Not showing close matches.
PICList Thread
'[EE]: FAST Low-Cost Programmer for 24LC256 I2C EEP'
2002\12\19@143913 by Steve Rapinchuk

flavicon
face
I've got a client that is looking for a fast low-cost ganged programmer for
24LC256 (32KB) 8-pin DIP serial I2C EEPROMs. They currently have a Microchip
SEEVAL and a Promate II. However, both of these are very sloooow:

SEEVAL ~3 minutes
Promate II ~ 6 minutes

This is a joke considering I've written code on a PIC18F252 to completely
program this chip in about 10 seconds while doing a bunch of other tasks
at the same time. They don't want to spend too much money on another
programmer since they're going to eventually change to surface mount and
I'll have to add some code to the PIC to program it in-circuit.

Can someone recommend a fast (< 30 seconds) low-cost programmer? A ganged
programmer would be nice; however, maybe that's asking for too much.


Thanks!

Steve Rapinchuk
spam_OUTsteveTakeThisOuTspamoakvalley.com

--
http://www.piclist.com hint: The list server can filter out subtopics
(like ads or off topics) for you. See http://www.piclist.com/#topics

2002\12\19@155614 by Spehro Pefhany

picon face
At 11:31 AM 12/19/02 -0800, you wrote:
>I've got a client that is looking for a fast low-cost ganged programmer for
>24LC256 (32KB) 8-pin DIP serial I2C EEPROMs. They currently have a Microchip
>SEEVAL and a Promate II. However, both of these are very sloooow:
>
>SEEVAL ~3 minutes
>Promate II ~ 6 minutes
>
>This is a joke considering I've written code on a PIC18F252 to completely
>program this chip in about 10 seconds while doing a bunch of other tasks
>at the same time. They don't want to spend too much money on another
>programmer since they're going to eventually change to surface mount and
>I'll have to add some code to the PIC to program it in-circuit.

The theoretical maximum, ignoring communication time, is about 2.5 seconds
(5ms maximum write cycle per page x 512 pages). Communication might add
another second or so with a 400kHz bus. Plus another second or so to
verify.

>Can someone recommend a fast (< 30 seconds) low-cost programmer? A ganged
>programmer would be nice; however, maybe that's asking for too much.

Cost of time aside, it sounds like a fun project to make one with a PIC
and a few ZIFs. You could use the experience to debug the code that will
eventually go into their product, so the cost of your time wouldn't be
entirely down the drain from their perspective.

Best regards,

Spehro Pefhany --"it's the network..."            "The Journey is the reward"
.....speffKILLspamspam@spam@interlog.com             Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog  Info for designers:  http://www.speff.com

--
http://www.piclist.com hint: The list server can filter out subtopics
(like ads or off topics) for you. See http://www.piclist.com/#topics

More... (looser matching)
- Last day of these posts
- In 2002 , 2003 only
- Today
- New search...