Отправлено LDIR 23 ноября 2005 г. 09:57 В ответ на: Как правильно указать внешнюю SRAM в CodeVision ? отправлено LDIR 23 ноября 2005 г. 09:29

Страница 30, заголовок Using all Locations of External Memory Smaller than 64
Since the external memory is mapped after the internal memory as shown in Figure 11,
the external memory is not addressed when addressing the first 608 bytes of data
space. It may appear that the first 608 bytes of the external memory are inaccessible
(external memory addresses 0x0000 to 0x025F). However, when connecting an external
memory smaller than 64 KB, for example 32 KB, these locations are easily accessed
simply by addressing from address 0x8000 to 0x825F. Since the External Memory
Address bit A15 is not connected to the external memory, addresses 0x8000 to 0x825F
will appear as addresses 0x0000 to 0x025F for the external memory. Addressing above
address 0x825F is not recommended, since this will address an external memory location
that is already accessed by another (lower) address. To the Application software,
the external 32 KB memory will appear as one linear 32 KB address space from 0x0260
to 0x825F.

т.е. я имею память 0000-825F ????

• Пардон, не обратил внимания, что это Mega8515, а не 90S8515 . Про нее не знаю - не сталкивался. А вот в меге162 можно организовать ремаппинг по-всячески. Но не думаю, что это все поддерживает CV, имхо только ручками. — Гудвин   (23.11.2005 10:22 84.18.96.89, пустое)

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