MCUmall EPROM BIOS Chip Burner Forum
MCUmall EPROM BIOS Chip Burner Forum
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jpod1977

9 Posts

Posted - 07/15/2005 :  10:06:03  Show Profile  Reply with Quote
Need some help on what type of programing device to get
I'm programing AMD 27c512 in a DIP24 format that requires 12.75v to program
I currently have the top853 programer and it can olny read the chips because ther is no way to 12.75v to pin 22(Vpp) on the chip Because Of the 5v limit of the USB
Reply #1

usb

138 Posts

Posted - 07/15/2005 :  10:39:27  Show Profile  Reply with Quote
Hi, the TOP853 is able to program the 27C512 in DIP28 package.
The TOP853 has a build in DC-DC step-up converter, so it can provide the 12.75 Vpp for the programming.

Most of 27C512 are programming compatible. So, you can select different 27C512 for trying.

If you are sure your TOP853 does not provide 12.7V vp on Pin22, then your programmer need to be serviced.
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Reply #2

jpod1977

9 Posts

Posted - 07/15/2005 :  10:56:18  Show Profile  Reply with Quote
well i open the unit and put my meter on the Vpp test point and it stated 5v add external 12 supply to this test point and was able to program the chip twice after that my hand slipped and burnt out aan ic on the board (got hot and smoked) and now computer is not able to find programer so i do need a new one was looking at the Dual Power Willem Universal EPROM Programmer but i want to be sure that this will suport this chip and P87C51 in PLCC44( with adaptor to DIP40)
AM27(c)64 and 27256 Mainly 27 series in 12v PGM
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Reply #3

usb

138 Posts

Posted - 07/15/2005 :  11:12:28  Show Profile  Reply with Quote
Aha! It's not a good sign if smoke came out from the programmer board. Then you need a new programmer.

Yes. The dual power willem programmer is working very well on the most EPROM programming. Such as 27C512. I have programmed lots of them already.

However, you need set some jumpers before doign programming.

Edited by - usb on 07/15/2005 11:13:55
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Reply #4

jpod1977

9 Posts

Posted - 07/15/2005 :  11:20:48  Show Profile  Reply with Quote
Thank you much im ordering it now
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