KS8995M Micrel, Inc. KS8995M Integrated 5-Port 10/100 Managed Switch Rev 1.13 General Description Features The KS8995M is a highly integrated Layer-2 managed switch with optimized BOM (Bill of Materials) cost for low port count, cost-sensitive 10/100Mbps switch systems. It also provides an extensive feature set such as tag/port-based VLAN, QoS (Quality of Service) priority, management, MIB counters, dual MII interfaces and CPU control/data interfaces to effectively address both current and emerging Fast Ethernet applications. The KS8995M contains five 10/100 transceivers with patented mixed-signal low-power technology, five MAC (Media Access Control) units, a high-speed non-blocking switch fabric, a dedicated address look-up engine, and an on-chip frame buffer memory. All PHY units support 10BaseT and 100BaseTX. In addition, two of the PHY units support 100BaseFX (Ports 4 and 5). All support documentation can be found on Micrel’s web site at: www.micrel.com. • Integrated switch with five MACs and five Fast Ethernet transceivers fully compliant to IEEE 802.3u standard • Shared memory based switch fabric with fully nonblocking configuration • 1.4Gbps high-performance memory bandwidth • 10BaseT, 100BaseTX and 100BaseFX modes (FX in Ports 4 and 5) • Dual MII configuration: MII-Switch (MAC or PHY mode MII) and MII-P5 (PHY mode MII) • IEEE 802.1q tag-based VLAN (16 VLANs, full-range VID) for DMZ port, WAN/LAN separation or inter-VLAN switch links • VLAN ID tag/untag options, per-port basis • Programmable rate limiting 0Mbps to 100Mbps, ingress and egress port, rate options for high and low priority, per-port-basis • Flow control or drop packet rate limiting (ingress port) • Integrated MIB counters for fully compliant statistics gathering, 34 MIB counters per port Functional Diagram 10/100 T/Tx 1 10/100 MAC 1 Auto MDI/MDIX 10/100 T/Tx 2 10/100 MAC 2 Auto MDI/MDIX 10/100 T/Tx 3 10/100 MAC 3 Auto MDI/MDIX 10/100 T/Tx/Fx 4 10/100 MAC 4 Auto MDI/MDIX MII-P5 MDC, MDI/O MII-SW or SNI 10/100 T/Tx/Fx 5 10/100 MAC 5 Control Reg I/F LED0[5:1] LED1[5:1] LED2[5:1] SNI LED I/F FIFO, Flow Control, VLAN Tagging, Priority Auto MDI/MDIX 1K look-up Engine Queue Mgmnt Buffer Mgmnt Frame Buffers SPI MIB Counters Control Registers EEPROM I/F KS8995M Micrel, Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 944-0970 • http://www.micrel.com July 2006 1 M9999-070506
