Date   : Sat, 28 May 2011 00:59:32 +0100
From   : profpep@... (Mike Pepper)
Subject: SW-RAM Questions

A fast answer is to plug it into one of these:

http://pdfserv.maxim-ic.com/en/ds/DS1213D.pdf

and then fit that as a part to the BBC. It does all the hard work for you.

Thye also have a part called, 'Smart Watch' which has a real time clock as
well. I used one on my old BBC based heating controller. Not sure if the
watch variant comes in 32 pin though.

||\/||ike


----- Original Message ----- 
From: "Matt Walker" <walker_matt@...>
To: <bbc-micro@...>
Sent: Friday, May 27, 2011 9:50 PM
Subject: [BBC-Micro] SW-RAM Questions


> Ok, few questions before I before I fit some sideways ram.
> Will this
>
http://pdf1.alldatasheet.com/datasheet-pdf/view/82765/CYPRESS/CY62256LL.html
> (this is the exact datasheet for the chips I have)
> work as described here     http://mdfs.net/Info/Comp/BBC/SROMs/32K/
> Is it the right speed etc?
>
> Also, is a battery backup for the SW-RAM as simple as 3 AAs and a diode
> connected to the GND and Vcc pins of the chip?
>
>
>
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