Re: TI-H: Internal mem expander question

To: ti-hardware@lists.ticalc.org
Subject: Re: TI-H: Internal mem expander question
From: Firepower5@aol.com
Date: Sun, 22 Nov 1998 22:18:14 EST
Delivered-To: ti-hardware-outgoing@towerguard.unix.edu.sollentuna.se
Reply-To: ti-hardware@lists.ticalc.org


In a message dated 11/20/98 10:00:34 PM Central Standard Time,
gussie@alaska.net writes:

> >>  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
OK thanks for clearing that up.

Rob Hornick

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