Re: TI-H: Internal mem expander question
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Re: TI-H: Internal mem expander question
>In a message dated 11/20/98 5:52:13 PM Central Standard Time,
>gussie@alaska.net writes:
>
>> >> Get it? :) having it work 50% of the time isn't fun...
>> >I don't quite understand this. Have you looked at the plans, Grant? To
>me
>> >(and I don't think I know as much as you at all, but...) they make sense,
>> and
>> >it's very hard for electronics to make sense to me. Maybe I'm wrong,
>but...
>>
>> >what would make this work 50% of the time? It is possible it would not
>> work
>> >at all, or work all the time, but 50%? That just doesn't make sense to
>me.
>> >Keep in mind I am not flaming you, I am asking a question.
>> Switching CS lines improperly. There is a setup/down time that is about
>> 200ms I think. If you leave it at high impeedance it can leave the chip in
>> unexpect states.
>So you mean that after turning the calc off, you have to wait 200 ms before
>switching the switch, and another 200 ms before turning it back on?
>
>Rob Hornick
It means in normal conditions the recomended transition time is less than
200ms. This isn't alaways the case though. Some chips are better than
others...
Grant
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