I read somewhere that it may be possible to read data from an old / bad EPROM by lowering the voltage. That some Eproms will read OK at 4 volts and not at 5.
Any body heard of this?
And if so - how to do it using the S4?
Any hints much appreciated!
Best regards,
/Peter
Using low voltage to read Old/Bad Eproms?
Re: Using low voltage to read Old/Bad Eproms?
Hi Peter
From what i know the S4 lowest voltage is 5v as i know it wont do flash chips at 3.3v as the hardware in the S4 just won't do it. as it is a good few years old and back then 5v was the standard, and hence has now been discontinued by Dataman for which i for one am sad about.
Maybe they now do a usb programmer that the supply voltage can be changed on, but perhaps Neil will know the answer to that one
hope that helps alittle
Cheers
Andrew
From what i know the S4 lowest voltage is 5v as i know it wont do flash chips at 3.3v as the hardware in the S4 just won't do it. as it is a good few years old and back then 5v was the standard, and hence has now been discontinued by Dataman for which i for one am sad about.
Maybe they now do a usb programmer that the supply voltage can be changed on, but perhaps Neil will know the answer to that one
hope that helps alittle
Cheers
Andrew
-
Dataman (Neil Parker)
- Posts: 931
- Joined: 10 Nov 2011 09:51
Re: Using low voltage to read Old/Bad Eproms?
Hello Peter,
Andrew is correct in that the S4 is not able to generate voltages lower than 5v.
I can however offer you a solution: the Dataman-40Pro.
The 40Pro is one of our lowest cost programmers. As its name suggests it is specialised in supporting memory devices. A full device support list and the full product specifications can be found on our website www.dataman.com
The 40Pro is a PC based USB programmer which supports over 24,800 devices(08/2010). It comes with all the cables and software needed to start programming straight out of the box. The software is updated on a monthly basis.
Specifically, the feature that will help you is the "Generic-EPROM" selection. Simply select a device of the correct size from this catagory and you will then be able to modify the following parameters:
As you can see, the VCC voltage can be set anywhere from 2-7v and you can also tweak the current values and basic timing parameters in order to try and get a good read from a device.
The 40Pro is available from stock and comes with a 3 year warranty as standard. We also offer a 30 day money back guarantee, so if the programmer doesn't do what you need, simply return it for a full refund.
If you have any questions, please do not hesitate to contact me.
Best regards
Neil Parker
Dataman Programmers
Andrew is correct in that the S4 is not able to generate voltages lower than 5v.
I can however offer you a solution: the Dataman-40Pro.
The 40Pro is one of our lowest cost programmers. As its name suggests it is specialised in supporting memory devices. A full device support list and the full product specifications can be found on our website www.dataman.com
The 40Pro is a PC based USB programmer which supports over 24,800 devices(08/2010). It comes with all the cables and software needed to start programming straight out of the box. The software is updated on a monthly basis.
Specifically, the feature that will help you is the "Generic-EPROM" selection. Simply select a device of the correct size from this catagory and you will then be able to modify the following parameters:
As you can see, the VCC voltage can be set anywhere from 2-7v and you can also tweak the current values and basic timing parameters in order to try and get a good read from a device.
The 40Pro is available from stock and comes with a 3 year warranty as standard. We also offer a 30 day money back guarantee, so if the programmer doesn't do what you need, simply return it for a full refund.
If you have any questions, please do not hesitate to contact me.
Best regards
Neil Parker
Dataman Programmers
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