Differences between ARM3 and Microcontrollers

I just made the term up, I used to play a lot of video games and that was the general term for actions such as that. (action) - farming

Anyway, I know this topic is called anything related to the TLC5940 or lighting, but is there something I could use that would be able to fade all 3 leds of 4 RGB leds that can do what I need? I've done quite a lot of looking around in my spare time, and although I've never looked specifically for an IC that doesn't need the clock signal, i've never seen one.