This part is a kind of semiconductor called AR9344.

Function of this product has Highly-Integrated and Feature-Rich IEEE 802.11n 2x2 2.4/5 GHz Premium SoC.

Manufacturers : Atheros

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Some of the text within the PDF file :

Data Sheet PRELIMINARY December 2010 AR9344 Highly-Integrated and Feature-Rich IEEE 802.11n 2x2 2.4/5 GHz Premium SoC for Advanced WLAN Platforms General Description The Atheros AR9344 is a highly integrated and feature-rich IEEE 802.11n 2x2 2.4/5 GHz Systemon-a-Chip (SoC) for advanced WLAN platforms. It includes a MIPS 74Kc processor, PCI Express 1.1 Root Complex and Endpoint interfaces, five port IEEE 802.3 Fast Ethernet Switch with MAC/ PHY, one MII/RMII/RGMII interface, one USB 2.0 MAC/PHY, and external memory interface for serial Flash, SDRAM, DDR1 or DDR2, I2S/ SPDIF-Out audio interface, SLIC VOIP/PCM interface, two UARTs, and GPIOs that can be used for LED controls or other general purpose interface configurations. The AR9344 supports 802.11n operations up to 144 Mbps for 20 MHz an [ ... ]

AR9344 PDF Datasheet Download