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Those chips should work with the default 28C code. I haven't tried a 29C256, but have successfully burned a 29C010. I just uploaded gerbers for an updated version of the TommyPROM32 board. This has a second switchable VPP line and some other small changes. Be aware that some 29C040 chips have a 256 byte sector size. Those won't work with the current code because the 128 byte packet size in XModem will cause two separate write operations and the chip will erase the sector for each write. |
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I have some Atmel 29C256 flash chips I need to program. Pinwise they're identical to the 28C256 chips, except the A14 and WE pins are swapped.
Based on my reading of its datasheet, the 29C256 writes uses a 64-byte buffer (Atmel calls it a page) for writing.
Other than swapping the two pins on the 29C256, will I need to make any changes to the Arduino software to program it?
By the way, I'm very happy to see that PCBs are now available. I plan to order the 32-pin version, as most of the EEPROMs I need to program are 32 pins (29C020 and 29C040).
Thanks for a great product!
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