SigmaTel
SigmaTel was an American system-on-a-chip ( SoC ) , electronics and software company headquartered in Austin , Texas , that designed AV media player/recorder SoCs , reference circuit boards , SoC software development kits built around a custom cooperative kernel and all SoC device drivers including USB mass storage and AV decoder DSP , media player/recorder apps , and controller chips for multifunction peripherals . 
<triplet> SigmaTel <subj> system-on-a-chip <obj> product or material produced <triplet> system-on-a-chip <subj> controller chips <obj> has part