Re: Question on TI TMS2532 EPROM in read mode
From: Norm Dresner (ndrez_at_att.net)
Date: 09/01/04
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Date: Wed, 01 Sep 2004 13:42:54 GMT
"Commander Dave" <cmdr-dave@spamcop.net> wrote in message
news:yAfZc.1688$Np2.698@bignews4.bellsouth.net...
> Greetings,
>
> I was looking over the datasheet for the TI TMS2532 EPROM and was confused
> about how to use one of the pins.
>
> http://www.jrok.com/datasheet/TMS2532.pdf
>
> Pin 21 is defined as Vpp, which is supposed to be +25V when programming
the
> chip. When using the EPROM in a normal READ mode, should this pin be tied
to
> +5V or tied to GND?
>
> From the datasheet, it seems to me that it should be tied to +5V, but I
have
> a board running fine with it tied to GND. Any thoughts on this?
>
The timing diagram for the Read Cycle explicitly shows that pin going to
V_(Input Low) which is ~Gnd.
Norm
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