ATS2501 LQFP48 package.

Official site : //www.actions-semi.com/en/productview.aspx?cat=82&id=110

ATS250X is a third generation single-chip highly-integrated digital music system solution for devices such as dedicated audio players. It includes a high performance dsp with embedded RAM and ROM, ADPCM record capabilities and USB interface for downloading music and uploading voice recordings. ATS250X also provides an interface to SPDIF, flash memory, LED/LCD, button and switch inputs, headphones, and microphone, and FM radio input and control. It supports WMA and other digital audio standards. For devices like USB-Disk, it can act as a USB mass storage slave device to personal computer system. The Chip has low power consumption to allow long battery life and an efficient flexible on-chip DC-DC converter that allows many different battery configurations, including 1xAA, 1xAAA and Li-on. The built-in Sigma-Delta D/A includes a headphone driver to directly drive low impedance headphones. The A/D includes inputs for both Microphone and Analog Audio in to support voice recording and FM radio integration features. Thus, it provides a true ’ALL-IN-ONE’ solution that is ideally suited for highly optimized digital audio players.