This part is a kind of semiconductor called AR7242.

Function of this product has A High Performance And Cost-Effective Network Processor.

Manufacturers : Atheros

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Some of the text within the PDF file :

Data Sheet April 2011 AR7242: A High Performance And Cost-Effective Network Processor General Description The Atheros AR7242 is a high performance and cost effective network processor for access point, router, and gateway applications. It includes a MIPS 24Kc processor, PCI Express 1.1 host interface, integrated 10/100 Mbps Fast Ethernet MAC/PHY, one RGMII port, one USB 2.0 MAC/PHY, and external memory interface for serial Flash, DDR1 or DDR2 interface, an I2S audio interface, a high-speed UART, and GPIOs that can be used for LED controls or other general purpose interface configurations. The AR7242 is a memory-centric architecture including various DMA controlled interfaces that access the DDR memory. The AR7242 network processor, when paired with the AR928x/AR938x/AR939x single chip 80 [ ... ]

AR7242 PDF Datasheet Download