SX/BS is really a strange part. Now compared to other MCUs, 
BS is big (packaging) and expensive and consumes more current.
With the faster parts like bigger PIC18F, Silabs C8051, I 
think its days are numbered. Just look at the Parallax 
web site and you know that it is running in 1000s, whereas 
Microchip PICs and Atmel AVRs are running in millions and
millions. So SX/BS may only live in a small niche where
price, current and space do not matters (--> for some limited
hobby projects only). 

Xiaofan

> -----Original Message-----
> From: Peter Johansson [mailto:peter@elemental.org]
> Sent: Friday, February 25, 2005 2:47 AM
> To: Microcontroller discussion list - Public.
> Subject: Re: [EE]: realy fast microcontroller
> 
> 
> The SX is essentially a 12-bit PIC on steroids with no dedicated
> hardware I/O.  It also has very limited internal code (2K or 4K) and
> data (136 or 262 bytes) space.  This makes it very much an anomaly in
> todays world of fast uCs.
> 
> It is still questionable whether going this route is practical.
> Several people sell the SX48 with flash/sram/osc on DIP headers, but
> in the $50-$100 price range.  At that point, it might make a lot more
> sense to just go with a modern 16- or 32- bit chip in that price
> range.  The bigger, faster chips are going to continue to get cheaper,
> while production costs of an SX-based stamp are going to remain flat.
> 

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