Actions Semiconductor (now Actions Technology) is a fabless chip designer based in Zhuhai, China. It develops audio processors and Bluetooth audio SoCs used in portable speakers, earphones and multimedia players.
ATJ2273B Highly Integrated SOC with Multiprocessor by Actions Semiconductor (LQFP128 E-PAD (14*14).): datasheet PDF, pinout and specifications.
ATJ3315 Third generation single-chip highly integrated digital music system solution by Actions Semiconductor (LQFP-64 (7x7mm) Type): datasheet PDF, pinout and