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Old 02-22-2018, 04:30 AM   #1
MadDog_945
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Hi,

does anyone have an eprom burner in Europe who can burn me software on a Chip?
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Old 02-22-2018, 01:55 PM   #2
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You could buy one.

http://www.ebay.co.uk/itm/NEW-Univer...QAAOSw5ZBWM2ik

http://www.ebay.co.uk/itm/New-TL866C...0AAOSwv0tVJ5Wa

Or I can burn and send you 27c256 chip for $25.
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Old 02-22-2018, 05:50 PM   #3
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I have a TL866 too. Works perfectly and is yours for 35 bucks if you search a little.

Do you think your first iteration of the software will already be good? If you have the burner you can make changes.
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Old 02-23-2018, 07:19 AM   #4
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yep ... the minipro tl866cs is cheap...
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Old 02-24-2018, 09:38 AM   #5
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ok, what chips do i need for LH and EZK
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Old 02-24-2018, 01:03 PM   #6
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I've been using SST 27SF512's on lh2.4/ezk116 just fine. Just make sure to set the burn offset to 8000
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Old 02-24-2018, 04:00 PM   #7
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Both LH2.4 ECUs and chippable EZKs use a 27C256 EPROM. The EPROMs have a window in the center so that they can be erased with a special UV light. Most are shipped pre-erased, so you don't need to buy a UV eraser immediately. See jameco link.

I'm not sure what speed grade EPROMs were used by LH/EZK. I'd guess 150ns (shown as a -15 or -150 suffix on the part number). On Ebay, search for "TMS27C256-15" or just "27C256". I'd stay away from other speed grades (-20 -25 are too slow, -7 is faster but might cause extra electrical noise).

esmth's great suggestion uses an electrically erasable replacement for the original UV proms. These parts are automatically erased by the PROM programmer as part of the reprogramming (no UV eraser needed).

You should also be able to find "SST 27SF256" parts on ebay that won't need the 0x8000 offset during programming. (Note: there are lots of other brands of 32Kx8 flash proms available, but most are not pin compatible.)
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Old 02-24-2018, 04:13 PM   #8
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thx guys, you are awesome!
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Old 02-24-2018, 07:18 PM   #9
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Just watch out for the fake chips, no matter the brand. http://support.moates.net/fake-27sf512-chips/

I bought mine from Moates, but i'm in the US
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Old 02-25-2018, 01:40 PM   #10
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28 pin DIP 27c256 DIP the DIP is the important DIP of the DIP chip.

If you wanna get real technical volvo put better grade chips in the puters you know ones that work better at lower and higher temperatures. I wouldn't worry about that and also who here has programmed up a chip and it wasn't fast enough? Too slow of a chip? I call BS on that..

Also I wouldn't use electrically erasable chips in my DIP's configuration of chips. You forgot write once chips, why not use those?

Other then everybody has there own opinion on everything, yeah burn some chips, it's easy.

Last edited by sbabbs; 02-25-2018 at 01:47 PM..
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Old 02-25-2018, 04:04 PM   #11
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Quote:
Originally Posted by esmth View Post
Just watch out for the fake chips, no matter the brand. http://support.moates.net/fake-27sf512-chips/

I bought mine from Moates, but i'm in the US
I have bought chips which are "fake SST" according to some people. Never any problems with them.
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Old 02-25-2018, 04:57 PM   #12
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Quote:
Originally Posted by Sjeng View Post
I have bought chips which are "fake SST" according to some people. Never any problems with them.
i've been told a lot of them are OTP. If you burner has an identification function you can usually see what they really are
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Old 02-26-2018, 10:01 PM   #13
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Interesting to see that there's a problem with counterfeit SST chips. Over the weekend, I ordered 10 of the 27SF256 chips off ebay for $10 total. I'll post a followup once I get them and read out the ID codes (probably 4-6 weeks from China). It looks like Moates.net has genuine 27SF512 chips for $5 each.

As far as the design and speed grade goes, it's all a question of tolerance stackups -- if you have slow processor/latch/prom chips in a hot environment, it may be a bit flakey with slower speed grade proms. Most likely, it will be fine, but why not spend the extra $0.50 to be sure?

[I was thinking back and it's been just under 30 years ago that I did my last board design using UV EPROMs. Everything after that was all electrically erasable and programmable in place -- so much nicer to work with and to support in the field.]
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Old 03-03-2018, 09:29 PM   #14
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How do you change the offset to 8000????
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Old 03-04-2018, 12:49 PM   #15
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In the tl866cs mini pro program???
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Old 03-04-2018, 05:54 PM   #16
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buddrow
03-18-2015, 06:23 PM
With the MiniPro 866tls, open the MoniPro programming software, click File, Open. Select your bin, the File Load Options tab should appear. The line that says " To Buffer Start Address is where you insert the offset address.

Buddrow

http://www.eevblog.com/forum/blog/ee...rammer-review/

Last edited by sbabbs; 03-04-2018 at 07:06 PM..
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Old 03-04-2018, 08:57 PM   #17
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I'll give it a try! Thank you very much!
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Old 03-12-2018, 09:45 PM   #18
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I got my 10 for $10 china ebay chips in the mail today. They appear to be genuine SST27SF256 chips -- the device ID is correct, and I can erase them with my old EasyPro 90B programmer but I was unable to program more than one byte at a time. Overall, it's a fail.

I suspect my programmer and not the chips. I did find a newer version of the programmer software but support for the SST27SF256 chips had been removed, which is why I suspect the programmer.

Last edited by bobxyz; 03-12-2018 at 11:07 PM.. Reason: typo
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Old 03-12-2018, 09:54 PM   #19
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Fake chip, you can program it once and that's it.
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Old 03-12-2018, 09:55 PM   #20
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Nope, I can erase it fine. I can program one byte to whatever I want just fine, erase it again, program something different, but just the one byte. I can do this with any one byte in the 32KB range so I'm guessing the programming algorithm is too fast and fails on the 2nd byte.
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Old 03-12-2018, 10:17 PM   #21
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SST27C256 doesn't exist. What did you buy?
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Old 03-15-2018, 09:24 AM   #22
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Quote:
Originally Posted by bobxyz View Post
Nope, I can erase it fine. I can program one byte to whatever I want just fine, erase it again, program something different, but just the one byte. I can do this with any one byte in the 32KB range so I'm guessing the programming algorithm is too fast and fails on the 2nd byte.
Some programmers verify each byte right after it's written. It may be writing one byte, verifying it and failing because it couldn't be written again correctly.

Try writing all 0x00 to it, then erase it, which should set all bytes to 0xff. It'll probably not be able to do so with OTP chips. Some software has a "verify blank" feature, see if yours has that

Also both of my programmers, Willem PCB3 and Willem PCB6 have functions to set the read/write speed
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Old 03-18-2018, 04:55 PM   #23
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After confirming that the programming algorithm used by my EasyPro 90B programmer was bad, I borrowed a MiniPro TL886A programmer. With the new programmer, the ebay SST27SF256 chips, that I bought a few weeks ago, work fine.

I'm able to program them to whatever I want, verify, erase, re-program to something else, etc. Vendor and Chip IDs are correct (xBF xA3). I also swapped one into a Bosch LH2.4 '937 ECU and it worked correctly on the benchtop (not an extensive test, but as good as I can do since I don't have a running Volvo with LH2.4 at this time).

[Note: the chips that I received from ebay had the "SST MTP" logo on them, not the "SST" only logo shown in the ebay listing. The MTP is Many Time Programmable, versus OTP One Time Programmable". Both logos are original from SST.]
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Old 03-18-2018, 08:55 PM   #24
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Quote:
Originally Posted by bobxyz View Post
After confirming that the programming algorithm used by my EasyPro 90B programmer was bad, I borrowed a MiniPro TL886A programmer. With the new programmer, the ebay SST27SF256 chips, that I bought a few weeks ago, work fine.

I'm able to program them to whatever I want, verify, erase, re-program to something else, etc. Vendor and Chip IDs are correct (xBF xA3). I also swapped one into a Bosch LH2.4 '937 ECU and it worked correctly on the benchtop (not an extensive test, but as good as I can do since I don't have a running Volvo with LH2.4 at this time).

[Note: the chips that I received from ebay had the "SST MTP" logo on them, not the "SST" only logo shown in the ebay listing. The MTP is Many Time Programmable, versus OTP One Time Programmable". Both logos are original from SST.]
Nice! you got a steal with 10 MTP chips for $10. How long did they take to arrive after ordering?
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Old 03-19-2018, 05:10 PM   #25
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I also ordered the sst chips off eBay from china. I am using the tl866 programmer too. It took about a week to get them....surprisingly fast for the slow boat from china. I splurged and ordered the 10 chips for 18.99 and they work great!!!
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