Re: TI-H: Internal mem expander question
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Re: TI-H: Internal mem expander question
I don't think that's exactly what he means. See, when you turn the calc off,
it doesn't actually "turn off", because you would lose all the contents of
your memory. It is my understanding that when it's "turned off" the chip is
in a sleep state, and the memory is still active. Therefore, this switching
could cause some serious problems. Just a thought...
-- Jon Olson
-----Original Message-----
From: Firepower5@aol.com <Firepower5@aol.com>
To: ti-hardware@lists.ticalc.org <ti-hardware@lists.ticalc.org>
Date: Friday, November 20, 1998 7:01 PM
Subject: 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
>
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