Re: 68HC11F1 and external RAM performance

In article <1128434630.362075.119220@xxxxxxxxxxxxxxxxxxxxxxxxxxxx>,
wolf42@xxxxxxxxx says...
> Hi everybody,
> I am currently working on a 68H11F1 only using the 1kB internal RAM. A
> so small amount of RAM doesn't allow many evolutions of the software.
> That's why I am wandering which would be the perfomance drawbacks if I
> use 4KB external RAM ?
> Could some of you tell me (our spot me a good doc) about the difference
> between internal and external RAM access time on a 68HC11F1 ?
>
> Thanks
> Wolfgang
>
>
Even the fastest F1 version can still be serviced by cheap SRAMs with no
wait states needed. Therefore, there is no speed penalty for using
external memory. I don't understand what you mean by "so small amount
of RAM doesn't allow many evolutions of the software", though. Take a
look at 6116 or 62256 SRAMs and the like. Pretty much commodity items.



Jim

BTW, the data*** on the part has all of the bus timing information you
are asking for.

.