SM 16716 chips - instead of WS2801

Anyone know about these? I can't find any info in English. My LED pixel supplier is using SM 16716 instead of WS2801 in pixels.

he says they are 256 PWM levels, and more stable than the WS2801, but he doesn't know much about what signla to feed them.

My alternative is LPD6803, but those are only 32 PWM levels, although I already have my sketches written for those, Id rather move up to 256 levels and tweak my code a bit.

The Fast SPI library now supports them: Google Code Archive - Long-term storage for Google Code Project Hosting.

Cheers, Robert.