1. General The RL-AM05L-9344-V2.0 is a highly integrated and feature-rich IEEE 802.11n 1x1 2.4/5 GHz System-on-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/RGMII interface， one USB 2.0 MAC/PHY， and external memory interface for serial Flash， 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 and 150 Mbps for 40 MHz respectively， and 802.11a/b/g data rates. Additional features include Maximal Likelihood （ML） decoding， Low-Density Parity Check （LDPC）， Maximal Ratio Combining （MRC）， Tx Beamforming （TxBF）， and On-Chip One-Time Programmable （OTP） memory. The AR9344 PCIE Root Complex interface can be used to connect to another Atheros single-chip MAC/BB/radio for dual concurrent WLAN applications. The AR9344 supports booting from either NOR or NAND flash. If NOR flash is used as boot codestore， an additional NAND flash device can still be connected， for end-user multi-media storage and other applications. When connecting the AR9344 to an external host through the PCIE Endpoint interface， or the USB Device interface， the AR9344 can off load the host CPU from computation- intensive functions， allowing it to focus on its dedicated tasks. 1.1 Features ■ 74Kc MIPS processor with 64 KB I-Cache and 32 KB D-Cache， operating at up to 560 MHz ■ External 16- or 32-bit DDR1， DDR2 operating at up to 225 MHz （450 M transfers/sec） ■ NAND and SPI NOR Flash memory support ■ 10/100 Ethernet Switch with five IEEE 802.3 Ethernet LAN ports ■ MII/RGMII interface ■ 802.3az Energy Efficient Ethernet compliant ■ Hardware-based NAT & ACL accelerators for Ethernet interface ■ Both PCI Express 1.1 Root Complex and Endpoint interfaces supported simultaneously ■ One USB 2.0 controller with built-in MAC/ PHY supports Host or Device mode ■ Boot from external CPU via PCIE， USB， xMII， eliminating need for external flash ■ I2S/SPDIF-out audio interface ■ SLIC for VOIP/PCM ■ One low-speed UART （115 Kbps）， one high-speed UART （3 Mbps）， and multiple GPIO pins for general purpose I/O ■ Fully integrated RF Front-End including PAs and LNAs ■ Optional external LNA/PA ■ 25 MHz or 40 MHz reference clock input ■ 1.2 V switching regulator ■ Advanced power management with dynamic