My next project would need a lot of EEPROM-- I figure about 2Kbytes, but
more would be nice. National Semi makes 16Kbit serial EEPROMS, but I was
wondering if there were any serial EEPROM devices out there larger than
that, wnd what the approximate cost is in units of one. I think I have to
go serial, 'cuz there aren't enough pins on a '54 to address a whole word
of external memory without a lot of support circuitry, which would add a
lot of cost.
Thanks-Matt
"DOS Computers manufactured by companies such as IBM, Compaq, Tandy, and
millions of others are by far the most popular, with about 70 million
machines in use wordwide. Macintosh fans, on the other hand, may note that
cockroaches are far more numerous than humans, and that numbers alone do
not denote a higher life form."
>
> My next project would need a lot of EEPROM-- I figure about 2Kbytes, but
> more would be nice. National Semi makes 16Kbit serial EEPROMS, but I was
> wondering if there were any serial EEPROM devices out there larger than
> that, wnd what the approximate cost is in units of one. I think I have to
Xicor's serial flash may be interesting, up to 64kbit I think, try http://www.xicor.com/
> go serial, 'cuz there aren't enough pins on a '54 to address a whole word
> of external memory without a lot of support circuitry, which would add a
> lot of cost.
>
> Thanks-Matt
>
>
> "DOS Computers manufactured by companies such as IBM, Compaq, Tandy, and
> millions of others are by far the most popular, with about 70 million
> machines in use wordwide. Macintosh fans, on the other hand, may note that
> cockroaches are far more numerous than humans, and that numbers alone do
> not denote a higher life form."
>
>
> My next project would need a lot of EEPROM-- I figure about 2Kbytes, but
> more would be nice. National Semi makes 16Kbit serial EEPROMS, but I was
> wondering if there were any serial EEPROM devices out there larger than
> that, wnd what the approximate cost is in units of one.
Microchips 24X65 are 64Kbit parts and are addressable so that 8 of them
can live on a 2 bit I2C bus. thats 64KBytes for about $40. and 2 IO pins.
>I think I have to
> go serial, 'cuz there aren't enough pins on a '54 to address a whole word
> of external memory without a lot of support circuitry, which would add a
> lot of cost.
Try 24C65 ( made by Microchip and others ) which has an IIC
interface and also has pins for selecting the address of the chip,
so you can use multiple chips on the same IIC bus ( I don't
remember exactly but I think that you can use 8 chips ). IIC
routines for PICs you can find in AN541 and AN555 from Microchip.
>My next project would need a lot of EEPROM-- I figure about 2Kbytes, but
>more would be nice. National Semi makes 16Kbit serial EEPROMS, but I was
>wondering if there were any serial EEPROM devices out there larger than
>that, wnd what the approximate cost is in units of one. I think I have to
>go serial, 'cuz there aren't enough pins on a '54 to address a whole word
>of external memory without a lot of support circuitry, which would add a
>lot of cost.
>
>Thanks-Matt
>
>
> "DOS Computers manufactured by companies such as IBM, Compaq, Tandy, and
>millions of others are by far the most popular, with about 70 million
>machines in use wordwide. Macintosh fans, on the other hand, may note that
>cockroaches are far more numerous than humans, and that numbers alone do
>not denote a higher life form."
>
At 2:22 PM 11/2/96, Matthew Mucker wrote:
>My next project would need a lot of EEPROM-- I figure about 2Kbytes, but
>more would be nice. National Semi makes 16Kbit serial EEPROMS, but I was
>wondering if there were any serial EEPROM devices out there larger than
>that, wnd what the approximate cost is in units of one. I think I have to
>go serial, 'cuz there aren't enough pins on a '54 to address a whole word
>of external memory without a lot of support circuitry, which would add a
>lot of cost.
National make a 8Mbit serial flash part. check their site.
craig
________________________________________________________
Dr. Craig Hollabaugh
Wireless Scientific, Inc.
1890 South 14th Street
Building 100, Suite 105
Amelia Island, FL 32034
904 261 6977
904 261 2129 fax spam_OUTwsciTakeThisOuTnet-magic.net
At 3:02 PM 11/2/96, Ian Stirling wrote:
>>
>> My next project would need a lot of EEPROM-- I figure about 2Kbytes, but
>> more would be nice. National Semi makes 16Kbit serial EEPROMS, but I was
>> wondering if there were any serial EEPROM devices out there larger than
>> that, wnd what the approximate cost is in units of one. I think I have to
>
>
>Xicor's serial flash may be interesting, up to 64kbit I think, try
>http://www.xicor.com/
I've prototyped the XICOR 24F128 connected to a '73. It worked fine with a
CCS compiled C program.
craig
________________________________________________________
Dr. Craig Hollabaugh
Wireless Scientific, Inc.
1890 South 14th Street
Building 100, Suite 105
Amelia Island, FL 32034
904 261 6977
904 261 2129 fax .....wsciKILLspam.....net-magic.net
At 3:19 PM 11/2/96, Byron A Jeff wrote:
>>
>> My next project would need a lot of EEPROM-- I figure about 2Kbytes, but
>> more would be nice. National Semi makes 16Kbit serial EEPROMS, but I was
>> wondering if there were any serial EEPROM devices out there larger than
>> that, wnd what the approximate cost is in units of one.
>
>Microchips 24X65 are 64Kbit parts and are addressable so that 8 of them
>can live on a 2 bit I2C bus. thats 64KBytes for about $40. and 2 IO pins.
National's new 8Mbit serial part costs around $20.
>>National Semi makes 16Kbit serial EEPROMS, but I was wondering if
>>>there were any serial EEPROM devices out there larger than that, wnd
>what the approximate cost is in units of one.
Microchip makes serial eeproms up to 64kbits. The 24C65 is $2.64 is
single units in DIP.
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