在SP-605上写入P30 strataflash时出现问题

今天是个好日子。
继Ken Chapman通过PicoBlaze控制Spartan 3E入门套件上的P30 Strataflash后，我很愿意将其改装为SP-605板。
除了ucf文件之外，两块板之间的主要区别在于，在sp-605板上，内存只接受16位宽的字，而在3e板上，由用户选择
8位或16位功能。
由于PicoBlaze是一个8位处理器，Ken Chapman明智地选择使用8位模式。
但就我而言，我必须将它扩展到16位。
到目前为止，擦除和读取内存没有问题。
写入时出现问题：当我命令存储器在给定的存储器地址中写入给定的字时，它总是在该地址中写入存储在闪存中的先前数据的结果和新的地址。
例如：如果我刚刚删除了内存（所有位= 1），则写入的数据将始终正常，因为XXXX AND FFFF = XXXX。
但它显然不适用于其他案件。
我回到了代码（psm和vhd）的时代，并没有找到错误。
我还重读了很多次内存数据表（如果有一个我没有考虑过的特殊功能），但没有任何线索。
关于此事的任何想法？
先谢谢您的帮助
Regads，
阿方索。



以下为原文

Good day everyone.

Following the great work by Ken Chapman on controlling a P30 Strataflash on the Spartan 3E starter kit via PicoBlaze, I'm willing to adapt it to the SP-605 board.
The key difference between both boards, apart from the ucf file, is the fact that on the sp-605 board, the memory only accepts 16-bit-wide words, whereas on the 3e board, it was up to the user to select an 8-bit or 16-bit functionning. Since PicoBlaze is a 8-bit-processor, Ken Chapman wisely chose to do it using the 8 bit mode. But in my case, I must extend it to 16 bits.
So far, there's no problem at erasing and reading the memory. The trouble comes when writing: when I order the memory to write a given word in a given memory address, it always will write in that address the result of the previous data stored in the flash AND the new one. For example: if i've just erased the memory (all bits = 1), the written data will always be ok, since XXXX AND FFFF = XXXX. But it doesnt obviously work for the rest of the cases.
I've come back to the code (both psm and vhd) thousends of times and haven't been able to find the mistake. I've also re-read many times the memory datasheet (in case there's a special functionning that I haven't taken into account) but no clue.
Any idea on the matter?

Thanks in advance for the help
Regads,
Alfonso.