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Re: [AVR-Chat] Re: Serial Flash

2005-08-31 by Ivan Vernot

Stefan,
When you say '5V tolerant' I understand that a micro (@5V) can write to the 
Flash (@3.3v).
But what do you do for the data coming OUT of the data flash?  So you just 
use a pull-up resistor, or something else?

Ivan.
----- Original Message ----- 
From: "Stefan Wimmer" <yahoo@wsw-elektronik.de>
To: <AVR-Chat@yahoogroups.com>
Sent: Thursday, September 01, 2005 2:51 AM
Subject: [AVR-Chat] Re: Serial Flash


> --- In AVR-Chat@yahoogroups.com, "Arif YILMAZ" <arif.yilmaz@b...> wrote:
>> hello  dear members,
>> i need a high capacity serial flash chip and i will use the following
>> from ST ,
>>
>> http://www.st.com/stonline/products/literature/ds/10980/m25pe40.htm
>>
>>  but it is 3.3 V
>>
>> do you know any other alternative for this serial flash memory about
>> 512K flash with SPI interface and 5V supply?
>
> Hi Arif,
>
> I'm using the dataflashs from Atmel in some applications. They're 3.3V
> too, but fully 5V-tolerant at the I/Os. A small LDO like
> LP2950/2980/2985 for the 3.3V and you're done...
>
> Stefan
>
>
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