All Forums  MCUmall Forums  True USB Willem Programmer (GQ-2X,3X,4X & GQ-4x4)  Problem with ST M27C256B

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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 cmazzanti[/i] [br]Trying to program ROM code into a several UV erasable ST M27C256B chips. Programmer is a GQ-3X Re-1.00. I select the exact chip type, blank check, load the bin file and program. Every 128th byte does not program. In other words, $7F, $FF, $17F, $1FF, etc, are unprogrammed (data value = $FF). The only exception is the LAST byte in the buffer, $7FFF, which programs fine. This seems to only happen with ST M27C256B devices. I tested programming the same BIN file into a TI TMS27C256 and a Microchip 27HC256 and both programmed just fine. I have tried programming 6 different ST devices, 4 of which were brand new from the manufacturer. All had the same problem. I have also tried lowering the speed, doing a double write, and changing devices to the generic 27C256. Each time the results are the same - I cannot program the ST devices. [/quote]    Insert an Image File Check here to include your profile signature.