The SigmaTel STMP3700 is a low power System on Chip (SoC) made for PMP's (Portable Media Players).
The STMP3700 is using a single ARM processor core clocked up to a maximum of 300 MHz.
It supports playing video in QVGA and decoding of various media formats.
The STMP378x supports VGA resolutions of 640×480, higher clock frequencies and video hardware assist.
Sony Walkman models using this product line include Salsa, Newton, and Freed which appeared at CES 2009.