Name this CPU

(in order of importance)

* internal SRAM and FLASH ROM (protected from reading)

* instruction set similar to x86, including:
     instruction mnemonics,
     addressing modes,
     8-16-32bit regs,
     read/write 8-16-32bit from/to internal/external memory,
     FPU

* 32megs of addressable external memory

* timers/counters, external IRQs, 32bits of memory-mapped I/O

* pin-count around 100 (32 for data, 32 for address, 32 for I/O)


Does it exist?

Thank you

aleksa wrote:
> (in order of importance)
> 
> * internal SRAM and FLASH ROM (protected from reading)
> 
> * instruction set similar to x86, including:

*pooff*

Well, that was quick. Your first two lines are mutually exclusive.
There are no x86 devices I know of with on-chip flash.

If you stretch the "similar to x86" a little, you could
include the Zilog eZ80Acclaim, tho it's not 32 bit native

FPU are also rare in single chip uC.

If you plan to use Off-Chip memory anyway, then on-Chip flash will only
constrain your choices.
Better might be newer lower power X86's
and use something like the Combo memory from SST.

http://www.sst.com/products.xhtml/combination/

Track the low-cost-notebook projects, to see what CPU they choose.

If you drop the unusual "similar to x86" caveat,
then this represents pretty much
the top-edge of FLASH Single chip Microcontroller :

http://techon.nikkeibp.co.jp/english/NEWS_EN/20070807/137541/

-jg

On Aug 19, 6:14 am, Jim Granville <no.s...@designtools.maps.co.nz>
wrote:
> aleksa wrote:
> > (in order of importance)
>
> > * internal SRAM and FLASH ROM (protected from reading)
>
> > * instruction set similar to x86, including:
>
> *pooff*
>
> Well, that was quick. Your first two lines are mutually exclusive.
> There are no x86 devices I know of with on-chip flash.
>

The Vortex86sx from DM&P (http://www.dmp.com.tw/) has on board 256k
flash, usually pre-installed with a bios. But I'm sure you can ask
nicely for a bios flashing utility if you want to overwrite it with
your own code. No built in SRAM though but the built in north bridge
has a DDR2 controller so interfacing with RAM is easy.

I've used them myself on ICOP boards (http://www.icop.com.tw/) in the
past. Nice little CPUs if you ever need to run legacy embedded DOS
apps. Runs a little hot at >150MHz for my tastes since I'm used to ARM
these days. But I've run them at 166MHz without fans (customer
requirement) and have had no problems so far apart form having to
redesign my casing to accomodate a large custom heatsink.

Un bel giorno aleksa digit�:

> * internal SRAM and FLASH ROM (protected from reading)
> 
> * instruction set similar to x86, including:
>      instruction mnemonics,
>      addressing modes,
>      8-16-32bit regs,
>      read/write 8-16-32bit from/to internal/external memory,
>      FPU
> 
> * 32megs of addressable external memory
> 
> * timers/counters, external IRQs, 32bits of memory-mapped I/O
> 
> * pin-count around 100 (32 for data, 32 for address, 32 for I/O)

Probably I would do it with a FPGA (like a Spartan-3AN, it has the
configuration flash embedded and some low-pin versions).

-- 
emboliaschizoide.splinder.com

> If you stretch the "similar to x86" a little, you could
> include the Zilog eZ80Acclaim, tho it's not 32 bit native

Thank you for reminding me of the eZ80!

I remember that a few years ago Zilog announced the eZ80,
but have completly forgotten about it!

I'm used to Z80, there will be no problem programing it.

(The soldering will be an another story..)

aleksa wrote:
>>If you stretch the "similar to x86" a little, you could
>>include the Zilog eZ80Acclaim, tho it's not 32 bit native
> 
> 
> Thank you for reminding me of the eZ80!
> 
> I remember that a few years ago Zilog announced the eZ80,
> but have completly forgotten about it!
> 
> I'm used to Z80, there will be no problem programing it.
> 
> (The soldering will be an another story..)

  On this subject, Zilog have recently upgraded the eZ80, and
added this $75 module (they call ZDOT)

http://www.zilog.com/products/partdetails.asp?id=eZ80F917050SBCG

will save the soldering... ;)

-jg