KSZ8842-PMQL/PMBL 2-Port Ethernet Switch with PCI Interface Rev.1.5 General Description The KSZ8842-series of 2-port switches includes PCI and LinkMD non-PCI CPU interfaces. This datasheet describes the KSZ8842-PMQL/PMBL PCI CPU interface chips. KSZ8842-PMQL/PMBL can run in half-duplex mode KSZ8842-PMQL is PQFP package chip, KSZ8842-PMBL regardless of the application. The KSZ8842-PMQL/PMBL is LFBGA package chip. For information on the offers an extensive feature set that includes tag/port- KSZ8842-MQL/MBL CPU non-PCI interface switches, based VLAN, quality of service (QoS) priority refer to the KSZ8842-MQL/MBL datasheet. management, management information base (MIB) The KSZ8842-PMQL/PMBL is the industrys first fully counters, and CPU control/data interfaces to effectively managed 2-port switch with a 32 bit/33MHz PCI address Fast Ethernet applications. processor interface. It is a proven, 4th generation, The KSZ8842-PMQL/PMBL contains two 10/100 integrated Layer 2 switch that is compliant with the IEEE transceivers with patented, mixed-signal, low-power 802.3u standard. An industrial temperature grade version technology three media access control (MAC) units, a of the KSZ8842-PMQL/PMBL, also can be ordered the direct memory access (DMA) channel, a high-speed, KSZ8842-PMQLI/PMBL AM. non-blocking, switch fabric, a dedicated 1K entry The KSZ8842-PMQL/PMBL can be configured as a forwarding table, and an on-chip frame buffer memory. switch or as a low-latency (<310 nanoseconds) repeater Datasheets and support documentation can be found on in latency-critical, embedded or industrial Ethernet Micrels web site at: www.micrel.com. applications. For industrial automation applications, the Functional Diagram Figure 1. KSZ8842-PMQL/PMBL Functional Diagram LinkMD is a registered trademark of Micrel, Inc Magic Packet is a trademark of Advanced Micro Devices, Inc. Product/Application names used in this datasheet are for identification purposes only and may be trademarks of their respective companies. Micrel Inc. 2180 Fortune Drive San Jose, CA 95131 USA tel +1 (408) 944-0800 fax + 1 (408) 474-1000 Micrel, Inc. KSZ8842-PMQL/PMBL Power Modes, Packaging, and Power Supplies Features Full-chip hardware power-down (register configuration Switch Management not saved) provides for low power dissipation Non-blocking switch fabric assures fast packet delivery Per port-based software power-save on PHY (idle link by utilizing a 1K entry MAC Address look-up engine and detection, register configuration preserved) a store-and-forward architecture Single power supply: 3.3V Fully compliant with IEEE802.3u standards Commercial Temperature Range: 0C to +70C Full-duplex IEEE 802.3x flow control (Pause) with force Industrial Temperature Range: 40C to +85C mode option Available in 128-pin PQFP and 100-ball LFBGA Half-duplex back pressure flow control Additional Features Advanced Switch Management In addition to offering all of the features of an integrated IEEE 802.1Q VLAN support for up to 16 groups (full- Layer-2 managed switch, the KSZ8842-PMQL/PMBL range of VLAN IDs) offers: VLAN ID tag/untag options, per port basis Repeater mode capabilities to allow for cut through in IEEE 802.1p/Q tag insertion or removal on a per-port latency critical Industrial Ethernet or Embedded basis (egress) Ethernet applications Programmable rate limiting at the ingress and egress Dynamic buffer memory scheme essential for port applications such as Video over IP where image jitter is Broadcast storm protection unacceptable IEEE 802.1d spanning tree protocol support 2-Port switch with a 32-bit/33MHz PCI processor MAC filtering function to filter unicast packets interface. Unknown MAC address forwarding function Micrel LinkMD cable diagnostics to determine cable length, diagnose faulty cables, and determine distance- Direct forwarding mode enabling the processor to to-fault identify the ingress port and to specify the egress port Hewlett Packard (HP) Auto MDI-X crossover with IGMP v1/v2 snooping support for multicast packet filtering disable and enable options Four priority queues to handle voice, video, data, and IPV6 Multicast Listener Discovery (MLD) snooping control packets support Ability to transmit and receive jumbo frame sizes up to Monitoring 1916 bytes Port mirroring/monitoring/sniffing: ingress and/or egress Applications traffic to any port Management information base (MIB) counters for fully Video Distribution Systems compliant statistics gathering: 32 MIB counters per port High-end Cable, Satellite, and IP set-top boxes Loop back modes for remote failure diagnostics Video over IP Voice over IP (VoIP) and Analog Telephone Adapters Comprehensive Register Access (ATA) There are three kinds of register groups: Industrial Control in Latency Critical Applications The PCI configuration registers are used to initialize Motion Control and configure the PCI interface Industrial Control Sensor Devices (Temperature, The PCI control/status registers are used to Pressure, Levels, and Valves) communicate between the host and KSZ8842- Security and Surveillance Cameras PMQL/PMBL Switch registers are used to support transceiver control Markets and status. They are configurable on-the-fly (port- Fast Ethernet priority, 802.1p/d/Q, etc.) Embedded Ethernet QoS/CoS Packets Prioritization Support Industrial Ethernet Per port, 802.1p and DiffServ based Re-mapping of 802.1p priority field on a per port basis 2 M9999-100207-1.5 October 2007