> Isn't the Spartan a little overkill for this kind of application?
> Although the low-end chips in this family are about $10 in single
> quantities + $3 - $5 for the config EEPROM.
>
> The Xilinx XC9500 CPLD series might be a better choice. It's available
> in smaller configurations, it can handle 3.3 and 5V I/O, it's flash
> based so you don't need the external EEPROM, but it's still in-circuit
> programmable.
Personally, I'd say that's a matter of price. But going for a REC clone we
already needs 10 registers of 8bit which comes to 80 flipflops, going to
16MB will take another 8 for bank selection. So we already have used 88
flipflops (macrocells) before it comes to functionality... So we probably
won't go for a XC95108/PC84 but at least a XC95144/TQ100 which costs
$15.95 at min buy 25 (www.avnetmarshall.com) and slowest speed.
Rainer
--
Rainer Buchty, LRR, Technical University of Munich
Phone: +49 89 289-28401, Fax +49 89 289-28232, Room S3240
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