8051 16k flash + 16k Ram

Hi

Can anybody point me to a standard 8051 with at lest 16K
program Flash and 16K or more data RAM.

USB may be a plus but component count is the issue.

Regards 

Graeme

graeme schrieb:

> Can anybody point me to a standard 8051 with at lest 16K
> program Flash and 16K or more data RAM.

RAM is always short with these small controllers.
None of those which have more than 256 byte is a "standard 8051".

The only type I know that has more than 8k is the uPSD 32xx by
STMicroelectronics with up to 32k RAM. Maybe overkill for your
application, since those also have hundreds of kilobytes flash, and come
in rather large packages.

Computer Solutions has a list of many 8051 derivatives:
<http://www.computer-solutions.co.uk/info/micro-search/8051/index.htm>
Maybe you have a look there. However: verify the search results to the
original data sheets.

Tilmann

> 16K or more data RAM.
serial SRAM via SPI: N256S08
http://www.amis.com/pdf/ulp_memory/serial_srams/N256S08xxHDA_ds.pdf
( was www.nanoamp.com , is www.amis.com , will be www.onsemi.com )

MfG  JRD

>Hi
>
>Can anybody point me to a standard 8051 with at lest 16K
>program Flash and 16K or more data RAM.
>
>USB may be a plus but component count is the issue.
>
>Regards 
>
>Graeme
>


Have a look at Atmel too.

http://www.atmel.com/dyn/products/param_table.asp?family_id=604&OrderBy=part_no&Direction=ASC

Cheers
Nico

Rafael Deliano wrote:
>> 16K or more data RAM.
> serial SRAM via SPI: N256S08
> http://www.amis.com/pdf/ulp_memory/serial_srams/N256S08xxHDA_ds.pdf
> ( was www.nanoamp.com , is www.amis.com , will be www.onsemi.com )
> 
> MfG  JRD

If serial RAM is considered useful, try MRAM:

http://en.wikipedia.org/wiki/Magnetoresistive_Random_Access_Memory

http://www.freescale.com/webapp/sps/site/overview.jsp?nodeId=015424

"graeme" <DELETETHIS_@googlemail.com> skrev i meddelandet
news:Cduzj.33632$d62.31324@newsfe6-gui.ntli.net...
> Hi
>
> Can anybody point me to a standard 8051 with at lest 16K
> program Flash and 16K or more data RAM.
>
> USB may be a plus but component count is the issue.
>
> Regards
>
> Graeme

Doubt that there is a lot of such 8051 chips available.
The ST uPSD combining flash + SRAM and CPLD.
    Sounds a little esoteric to me.
Triscend? Aren't they bankrupt?
The Dallas parts seems to be small PCBs with external SRAM/Flash
Cypress parts, RAM only, no flash.

Why use an 8051 in the first place.
What is the major obstacle to change?

You can get plenty of RAM if you go with a 32 bitter.
An AVR32 at 66 Mhz is fast enough to emulate a standard 8051 and you will
get USB.
If you need 100% peripheral emulation it is more difficult.
You typically then rewrite the program to move
all references to I/O to simple subroutines which
can be implemented in a different way on the 32 bitter.

The new X-Mega AVRs has 16 kB of SRAM, but flash
is of course larger than 16 kB.

-- 
Best Regards,
Ulf Samuelsson
This is intended to be my personal opinion which may,
or may not be shared by my employer Atmel Nordic AB

graeme wrote:

> Hi
>
> Can anybody point me to a standard 8051 with at lest 16K
> program Flash and 16K or more data RAM.
>
> USB may be a plus but component count is the issue.

At that RAM size you are getting thin on the ground,

ASIX do one, best is perhaps the UPSD3454 : nice family, and quite
available
 - showing thousands in stock at Digikey, (unlike ATxmega..)
and it has USB (easily meets 16KF and 16KR)

The SPI Sram N256S08 mentioned is another good option - that opens up
a much larger selection pool of devices. FRAM is also possible, but
the SRAM device is much cheaper, showing stocked at Future.

Dallas have 64K RAM + Ethernet devices

There are quite a few USB 80C51 variants.
New growth is devices like W681308 - VoIP USB Codec. 8051+USB+ADC+DAC
These target high volume/low prce, so only have as much ram as most
users need.

-jg

Look at www.silabs.com I like this Parts the debugging interface and
performance is great.


"graeme" <DELETETHIS_@googlemail.com> schrieb im Newsbeitrag
news:Cduzj.33632$d62.31324@newsfe6-gui.ntli.net...
> Hi
>
> Can anybody point me to a standard 8051 with at lest 16K
> program Flash and 16K or more data RAM.
>
> USB may be a plus but component count is the issue.
>
> Regards
>
> Graeme