The KS8995XA is a highly integrated Layer-2 quality ofservice (QoS) switch with optimized bill of materials (BOM)cost for low port count, cost-sensitive 10/100Mbps switchsystems. It also provides an extensive feature set includingthree different QoS priority schemes, a dual MII interface forBOM cost reduction, rate limiting to offload CPU tasks,software and hardware power-down, a MDC/MDIO controlinterface and port mirroring/monitoring to effectively addressboth current and emerging Fast Ethernet applications.The KS8995XA contains five 10/100 transceivers with pat-ented mixed-signal low-power technology, five media accesscontrol (MAC) units, a high-speed non-blocking switch fabric,a dedicated address lookup engine, and an on-chip framebuffer memory.All PHY units support 10BASE-T and 100BASE-TX. In addi-tion, two of the PHY units support 100BaseFX (Ports 4 and 5).