Re: 2.7 to 5V level shifting
- From: Eeyore <rabbitsfriendsandrelations@xxxxxxxxxxx>
- Date: Sun, 11 Mar 2007 15:19:08 +0000
Richard Hosking wrote:
Eeyore wrote:
Richard Hosking wrote:
Dear all
Looking for a simple way to interface 2.7V Flash Mmeory to a 5V uC.
The various peripherals in the system are 5V (LCD module, programming
interface, sensors) so it seems easiest to interface the memory. There
doesnt seem to be a serial flash available in 5V. Lots of parallel flash
devices at 5V but these are old and take too many lines
One line will have to be bidirectional
Will the 2.7V flash tolerate 5V I/O ? How about a part number ?
Atmel ATDB021B
I got the right part number.
These are easily available. I am basically a hobbyist. It is preferable
if the part is available from somewhere like Farnell
It looks from a brief glance at the data sheet that the inputs are 5V tolerant.
It might be a good idea to check that with Atmel to be confident.
In which case all you need to do is ensure that you uC will recognise its logic
1 output. That could be done with just a couple of resistors to help pull it up
a bit..
Graham
.
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- From: Richard Hosking
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- From: Eeyore
- Re: 2.7 to 5V level shifting
- From: Richard Hosking
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