All Forums  MCUmall Forums  True USB Willem Programmer (GQ-2X,3X,4X & GQ-4x4)  Problems writing to 27256

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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 akvgc[/i] [br]I received the unit, looks good and I successfully write a file to the supplied 27512 chip. I put several 27256 and 27c256 chips in the UV eraser for 35 minutes and try to write to them, no luck. Here is the process and error I receive: Erased 8 chips, 3 different manufacturers Select device in software (tried several including generic) Verified DIP settings Load device, check ID, looks fine Read chip, looks blank to me Did blank check, software says device is blank Load .bin file to buffer, file is the right size, looks good Try to write file to device (at several different speeds) Using several different chips and files, always receive message "Device write failed at address 0x000000 Buffer=0xf6 Device=0xff" (sometimes the last 2 digits of the buffer vary) I can write to other devices but not these 27256 series. What am I doing wrong? Thanks!! [/quote]    Insert an Image File Check here to include your profile signature.