KS8995M Micrel, Inc. Switch Controller On-Chip Frame Buffers System Level Applications SPI/GPIO 10/100 MAC 1 10/100 PHY 1 10/100 MAC 2 10/100 PHY 2 10/100 MAC 3 10/100 PHY 3 10/100 MAC 4 10/100 PHY 4 10/100 MAC 5 10/100 PHY 5 4-port LAN 1-port WAN I/F SPI Ethernet MAC MII-SW MII-P5 CPU Ethernet MAC External WAN port PHY not needed Switch Controller On-Chip Frame Buffers Figure 1. Broadband Gateway WAN PHY & AFE (xDSL, CM.) SPI/GPIO 10/100 MAC 1 10/100 PHY 1 10/100 MAC 2 10/100 PHY 2 10/100 MAC 3 10/100 PHY 3 10/100 MAC 4 10/100 PHY 4 10/100 MAC 5 10/100 PHY 5 4-port LAN SPI MII-SW CPU MII-P5 Ethernet MAC Figure 2. Integrated Broadband Router July 2006 7 M9999-070506