All Forums  MCUmall Forums  True USB Willem Programmer (GQ-2X,3X,4X & GQ-4x4)  Problem reading a new 24c01 eeprom in old system

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Screensize: 640 x 480 800 x 600 1024 x 768 1280 x 1024 UserName: Password: Format Mode: Basic  Help  Prompt  Format: Font Andale Mono Arial Arial Black Book Antiqua Century Gothic Comic Sans MS Courier New Georgia Impact Lucida Console Script MT Bold Stencil Tahoma Times New Roman Trebuchet MS Verdana   Size 1 2 3 4 5 6   Color Black Red Yellow Pink Green Orange Purple Blue Beige Brown Teal Navy Maroon LimeGreen Message: * HTML is OFF * Forum Code is ON Smilies [quote][i]Originally posted by rsm4mcumall[/i] [br]I am trying to replace a damaged CSI 24C01BJ EEPROM in an old system. The problem is that the data is not readable on a new chip in the old system. I can read the data and write the data to the old chips and install them into the old system and it works perfectly. I can write the data to a new chip and it will not read when installed in the old system. I can only read the data on the new chip with the USB programmer. Using GQ-4X with latest software downloaded from this site. I have tried the following 2 new chips: AT24C01BN-SH-T CAT24C01WI-GT3 I have tired different write speeds also. I need to be able to install a new chip to replace damaged or corroded ones that get returned from the field. Why can I read and write to an old original chip, but cant read the data back from a new chip when installed into the system???? Thanks ON Semiconductor only help after 3 days was this : Thank you for contacting ON Semiconductor. The old part CAT24C01B has a different functionality / addressing modes compared to CAT24C01. [/quote]    Insert an Image File Check here to include your profile signature.