Some one had suggested checking out http://www.ramtron.com
<http://www.ramtron.com>  - the make serial (SPI) FRAM - which is
non-volatile and has write speed of up to 5MHz.

David V. Fansler
Network Administrator
TriPath Imaging, Inc. (Formerly AutoCyte, Inc)
336-222-9707 Ext. 261
dfansler@TriPathImaging.com <mailto:dfansler@TriPathImaging.com>
Now Showing! www.dv-fansler.com <http://www.dv-fansler.com/>
Updated June 1, 2000
RF Ablation on Ann's Cancer

                -----Original Message-----
                From:   Harold Hallikainen
[mailto:haroldhallikainen@JUNO.COM]
                Sent:   Sunday, June 04, 2000 11:44 PM
                To:     PICLIST@MITVMA.MIT.EDU
                Subject:        Re: [PIC]: External SRAM on PIC (or AVR)

                        There have been lots of discussions about serial
SRAM on the list over
                the years. As far as I can tell, there aren't any of any
significant size
                out there. I WAS using the Dallas RamPort (DS1380 and
DS1381) 'til they
                discontinued them on us...  I'm now moving designs over the
the PIC18c452
                which has enough RAM for several products. On one product
I'm using the
                18c452 with several latches to drive a 128kbyte SRAM
(capacitor backed).
                That takes several chips. Seems like SOMEONE would make a
reasonably
                large serial SRAM, but that doesn't seem to be the case.

                Harold



                On Fri, 2 Jun 2000 09:11:59 +0200 TOM THERON
<mmsesys@ICON.CO.ZA> writes:
                > PCF8570 from Philips,  256 x 8,  i2c interface.
                >
                > Tom
                >
                > ----- Original Message -----
                > From: Bob Ammerman
                > To: PICLIST@MITVMA.MIT.EDU
                > Sent: Friday, June 02, 2000 4:18 AM
                > Subject: [PIC]: External SRAM on PIC (or AVR)
                >
                >
                > Just a dumb question: Serial RAM? I've heard of search
EEPROM and
                > serial
                > FLASH. I have had a couple applications where serial RAM
would have
                > been a
                > godsend. Does anybody make this? What capicity?
                >
                > Thanks,
                >
                > Bob Ammerman
                > RAm Systems
                > (high function, high performance, low level software)
                >
                >
                > ----- Original Message -----
                > From: Bennett, Matt <Matt.Bennett@ANDREW.COM>
                > To: <PICLIST@MITVMA.MIT.EDU>
                > Sent: Thursday, June 01, 2000 11:38 AM
                > Subject: [PIC]: External SRAM on PIC (or AVR)
                >
                >
                > > If you've used the external SRAM (as in STATIC, not
serial) on a
                > PIC or
                > AVR-
                > > which SRAM did you use?  I'm having problems finding a
64Kx8 part
                > that is
                > > pin compatible (without gates other than an address
latch) and is
                > in stock
                > > somewhere.  I could go to a 2 32K SRAMs, but I'd rather
not.
                > >
                > > The PIC (17C) uses an ALE, /OE, /WR scheme, and the AVR
uses an
                > ALE, /RD,
                > > /WR scheme.  The PIC appears compatible with the 61XXX
family of
                > SRAMs
                > (64Ks
                > > are currently being made of Unobtanium [Un]), but in my
brief
                > search, I
                > > haven't found any that are directly compatible with the
AVR's
                > scheme.
                > > Serial RAMs are not an option, due to speed issues.
                > >
                > > Matt Bennett


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