AR7242

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 802.11n MAC/BB/Radio family, provides the best-in-class WLAN solution capable of supporting 802.11b/g/n standards. Features ■ Integrated MIPS 24 K 32-bit processor operating at up to 400 MHz ■ 64 K instruction cache and 32 K data cache ■ Integrated 10/100 802.3 Ethernet LAN port and one RGMII port ■ 16-bit DDR1 or DDR2 memory interface supporting up to 400 M transfers per second ■ An external serial Flash memory interface (maximum 16 MBytes) ■ One USB 2.0 controller with built-in MAC/ PHY ■ High-speed UART and multiple GPIO pins for general purpose I/O or LED control ■ A single lane PCI Express 1.1 interface that can be used for interfacing to the AR928x/ AR938x/AR939x single chip 802.11n MAC...