Erasing external Flash
2006-03-02 by nagarkarajay
Hello, My setup: Phytec LPC2294 development board IDE - Crossstudio JTAG for debugging Flash Chips (AMD/Spansion 29LV320) mapped at 0x80000000. My issue: The code is on the external SRAM (0x81000000). Whenever I erase the flash chips using the commands given in the datasheet (AA at 555, 55 at 2AA, 80 at 555, 55 at 2AA , 10 at 555), I can see the chip erase (0xFF) in the memory window when I step run the program. I reset it and bring it back to read mode. Now this being a Flash memory I assume that this chip remains erased. However the next time I start debugging I can see some data on the chip. Has someone seen this issue before? What am I missing ? Any thoughts? Thanks Ajay