MCUmall EPROM BIOS Chip Burner Forum
MCUmall EPROM BIOS Chip Burner Forum
Home | Profile | Register | Active Topics | Members | Search | FAQ
Save Password
Forgot your Password?

 All Forums
 MCUmall Forums
 True USB Willem Programmer (GQ-2X, GQ-3X, GQ-4X)
 MX29F800 failure to Verify GQ-4x4
 New Topic  Reply to Topic
 Printer Friendly
Author Previous Topic Topic Next Topic  


1 Posts

Posted - 01/17/2016 :  21:14:25  Show Profile  Reply with Quote
Half of my MX29F800 chips fail to verify. I purchased 10 brand new from digikey and 6 of them fail to verify while 6 verified successfully. On every chip that fails:
Chip ID is correct.
Erase is successful.
Blank check ok.
Write is successful.
Verify fails at different locations every time.

Upon reading the data back and using HxD to compare files, there are as many as 10 errors!

I also bought 5 MX29F400 eeproms and all of these worked perfectly.

Something odd I have noticed is that the Device read data that is greater than the buffer. Every time. Typically there is only one bit different. For example: Device=0x3D, Buffer=0x3C.

Edited by - Jazzmarazz on 01/17/2016 21:15:31
  Previous Topic Topic Next Topic  
 New Topic  Reply to Topic
 Printer Friendly
Jump To:
MCUmall EPROM BIOS Chip Burner Forum © Copyright 2003 - 2009 Mcumall Electronics Inc. Go To Top Of Page
Generated in 0.19 sec. Snitz Forums 2000