FIFO, Flow Control, VLAN Tagging ,Priority KSZ8842-16/32 MQL/MVL/MVLI/MBL 2-Port Ethernet Switch with Non-PCI Interface Data Sheet Rev 1.9 General Description The KSZ8842-series of 2-port switches includes PCI and non-PCI CPU interfaces, and are available in 8/16-bit and 32-bit bus designs (see Ordering Information). LinkMD This datasheet describes the KSZ8842M-series of non- PCI CPU interface chips. For information on the The KSZ8842M offers an extensive feature set that KSZ8842 PCI CPU interface switches, refer to the includes tag/port-based VLAN, quality of service (QoS) KSZ8842P datasheet. priority management, management information base The KSZ8842M is the industrys first fully managed, 2- (MIB) counters, and CPU control/data interfaces to port switch with a non-PCI CPU interface. It is based on th effectively address Fast Ethernet applications. a proven, 4 generation, integrated Layer-2 switch, The KSZ8842M contains: Two 10/100 transceivers with compliant with IEEE 802.3u standards. Also an industrial patented, mixed-signal, low-power technology, two temperature grade version of the KSZ8842, the KSZ8842MVLI, can be ordered (see Ordering media access control (MAC) units, a direct memory access (DMA) channel, a high-speed, non-blocking, Information). switch fabric, a dedicated 1K entry forwarding table, and The KSZ8842M can be configured as a switch or as a an on-chip frame buffer memory. low-latency ( 310 nanoseconds) repeater in latency- critical, embedded or industrial Ethernet applications. For industrial applications, the KSZ8842M can run in half-duplex mode regardless of the application. Functional Diagram 1K lo ok -u p Engine P1 H P A u to 1 0 /1 00 B a s e - 10/100 MDI/MDI-X T/TX MA C 1 PH Y 1 S cheduling P2 H P A u to 1 0 /1 00 B a s e - M anagem ent 10/100 MDI/MDI-X T/TX MA C 2 PH Y 2 B u ffe r M anagem ent RXQ QM U Sw itch 4K B DM A Host N on-P C I C hannel TX Q MAC CPU 4KB Bus Fram e In te rfa c e B u ffe rs Unit Control R egisters 8 ,16 , or 32 -b it G e n e ric H o st MIB In te rfa c e Counters P 1 LE D 3:0 LE D EEPR O M Drivers In te rfa c e P 2 LE D 3:0 EEP R O M I/F Figure 1. KSZ8842M Functional Diagram LinkMD is a registered trademark of Micrel, Inc. Product names used in this datasheet are for identification purposes only and may be trademarks of their respective companies M9999-102207-1.9 October 2007 1 E m b e d d e d P ro c e s s o r In te rfa c eMicrel, Inc. KSZ8842-16/32 MQL/MVL/MVLI/MBL Features Industrial Temperature Range: 40C to +85C Switch Management (see Ordering Information) Non-blocking switch fabric assures fast packet Available in 128-pin PQFP and 100-ball LFBGA delivery by utilizing a 1K entry forwarding table (optional package: 128-pin LQFP) Fully compliant with IEEE 802.3u standards Available in 16 version for 8/16-bit bus support and Full-duplex IEEE 802.3x flow control (Pause) with 32 version for 32-bit bus support (see Ordering force mode option Information). 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 KSZ8842M offers: range of VLAN IDs) Repeater mode capabilities to allow for cut through in VLAN ID tag/untag options, on a per port basis latency critical industrial Ethernet or embedded Ethernet applications IEEE 802.1p/Q tag insertion or removal on a per port basis (egress) Dynamic buffer memory scheme Programmable rate limiting at the ingress and egress Essential for applications such as Video over IP ports where image jitter is unacceptable Broadcast storm protection 2-port switch with a flexible 8, 16, or 32-bit generic host processor interfaces IEEE 802.1d spanning tree protocol support Micrel LinkMD cable diagnostics to determine cable MAC filtering function to filter or forward unknown length, diagnose faulty cables, and determine unicast packets distance-to-fault Direct forwarding mode enabling the processor to Hewlett Packard (HP) Auto-MDIX crossover with identify the ingress port and to specify the egress port disable and enable options Internet Group Management Protocol (IGMP) v1/v2 Four priority queues to handle voice, video, data, and snooping support for multicast packet filtering control packets IPV6 Multicast Listener Discovery (MLD) snooping Ability to transmit and receive jumbo frame sizes up to support 1916 bytes Monitoring Port mirroring/monitoring/sniffing: ingress and/or Applications egress traffic to any port Video Distribution Systems MIB counters for fully compliant statistics gathering High-end Cable, Satellite, and IP set-top boxes 34 MIB counters per port Video over IP Loopback modes for remote failure diagnostics Voice over IP (VoIP) and Analog Telephone Adapters Comprehensive Register Access (ATA) Control registers configurable on-the-fly (port-priority, Industrial Control in Latency Critical Applications 802.1p/d/Q) Motion Control QoS/CoS Packets Prioritization Support Industrial Control Sensor Devices (Temperature, Pressure, Levels, and Valves) Per port, 802.1p and DiffServ-based Security and Surveillance Cameras Remapping of 802.1p priority field on a per port basis Power Modes, Packaging, and Power Supplies Markets Full-chip hardware power-down (register configuration not saved) allows low power dissipation Fast Ethernet Embedded Ethernet Per port-based, software power-save on PHY (idle link detection, register configuration preserved) Industrial Ethernet Single power supply: 3.3V Commercial Temperature Range: 0C to +70C M9999-102207-1.9 October 2007 2