Re: TI-H: Internal mem expander question
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Re: TI-H: Internal mem expander question
>In a message dated 11/19/98 10:48:43 PM Central Standard Time,
>gussie@alaska.net writes:
>
>> >I dont see what the big deal with this is grant. Just try it whoever
>> >wanted to make one, and if it works, great!! goal accomplished. grant
>was
>> >wrong. If it doesnt work, grant was right, you have two extra resistors
>> >and a switchand a nice 32k sram chip. i dont think the calc should have
>> >actual damage to it unless you seriously screwed up.
>> 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.
Grant
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