KSZ8842-16MQL KSZ8842-32MQL www.micrel.com Product Brief 2-Port Ethernet Switch with Non-PCI Interface Description Benefits The KSZ8842-16MQL and KSZ8842-32MQL are the industry’s first 2-port switches with a non-PCI CPU interface. The KSZ8842-16MQL (or -32MQL) is a proven, 4th generation, integrated, Layer 2 switch that is compliant to the IEEE802.3u standard. The KSZ8842-16MQL (or -32MQL) can be configured as a low-latency repeater to allow for ‘cut thru’ in latency critical Embedded or Industrial Ethernet applications. For industrial automation applications in the repeater mode, the KSZ8842-16MQL (or -32MQL) runs in half-duplex mode regardless of the application. The KSZ8842-16MQL (or -32MQL) offers an extensive feature set that includes tag/port-based VLAN, QoS priority management, MAC filtering function, MIB counters, and CPU control/data interfaces to effectively address both current and emerging Fast Ethernet applications. The KSZ8842-16MQL (or -32MQL) contains two 10/100 transceivers with patented mixed-signal low-power technology, two media access control (MAC) units, a direct memory access (DMA) channel, a high-speed non-blocking switch fabric, a dedicated 1K entry forwarding table, and on-chip frame buffer memory. Offers all of the features of an integrated Layer 2 managed switch plus: • Fully compliant to the IEEE802.3u standard • Repeater mode capabilities to allow for ‘cut-thru’ in latency critical Industrial Ethernet or Embedded Ethernet applications • MAC filtering function to filter unicast packets • Dynamic buffer memory scheme – Essential for applications such as Video over IP where image jitter is unacceptable • 2-Port switch with flexible 8-, 16- or 32-bit generic host processor interfaces • Micrel LinkMD® cable diagnostic capabilities to determine cable length, diagnose faulty cables, and determine distance to fault • HP Auto MDIX crossover with disable and enable option • Industrial temperature support: –40oC to +85oC (KSZ8842-16MVLI samples available) • Four priority queues to handle voice, video, data, and control packets Block Diagram 1K Look-up Engine 10/100 T/TX PHY 1 10/100 MAC 1 HP Auto MDI/MDI-X 10/100 T/TX PHY 2 10/100 MAC 2 DMA Channel Embedded Processor Interface Non-PCI CPU Bus Interface Unit 8,16, 32-bit Generic Host Interface FIFO, Flow Control, VLAN Tagging, Priority HP Auto MDI/MDI-X Queue Management Buffer Management Frame Buffers MIB Counters Control Registers EEPROM I/F P1 LED[3:0] P2 LED[3:0] LED Drivers Note: For an MII/RMII, I2C or SPI interface, use the KSZ8893MQL. LinkMD is a registered trademark of Micrel, Inc. Micrel, Inc. TEL: 1.408.944.0800 FAX: 1.408.474.1000 HTTP:// www.micrel.com EEPROM Interface Features Comprehensive Register Access Switch Management • Control registers configurable on the fly (port-priority, 802.1p/d/q) • Non-blocking switch fabric assures fast packet delivery by utilizing a 1K entry forwarding table • Fully compliant to the IEEE 802.3u standard • Full-duplex IEEE 802.3x flow control (Pause) with force mode option • Half-duplex back pressure flow control QoS/CoS Packets Prioritization Support • Per port, 802.1p and DiffServ based • Re-mapping of 802.1p priority field per port basis Advanced Switch Management • IEEE 802.1q VLAN support for up to 16 groups (full-range of VLAN ID) • VLAN ID tag/untag options, per port basis • IEEE 802.1p/q tag insertion or removal on a per port basis (egress) • Programmable rate limiting at the ingress and egress port • Broadcast storm protection • IEEE 802.1d spanning tree protocol support • MAC filtering function to filter or forward unknown unicast packets • Unknown MAC address forwarding function • Direct forwarding mode enabling the processor to identify the ingress port and to specify the egress port • IGMP v1/v2 snooping support for multicast packet filtering • IPv6 Multicast Listener Discovery (MLD) snooping support Monitoring Power Modes, Packaging and Power Supplies • Full-chip hardware power-down (register configuration not saved) provides for low power dissipation • Per port-based software power-save on PHY (idle link detection, register configuration preserved) • Single power supply: 3.3V • Commercial temperature range: 0oC to +70oC • Industrial temperature range: –40oC to +85oC (KSZ8842-16MVLI ordering code) • RoHS compliant devices Applications • Industrial applications for daisy chaining multiple devices • Industrial control in latency critical applications • Port redundancy and port monitoring • Security cameras • VoIP phone and ATA adaptors Markets • Port mirroring/monitoring/sniffing: ingress and/or egress traffic to any port • Management information base (MIB) counters for fully compliant statistics gathering: 34 MIB counters per port • Loopback modes for remote diagnostic of failure • Fast Ethernet • Embedded Ethernet • Industrial Ethernet For additional information, contact your local Micrel Field Application Engineer or salesperson. Contact Micrel Semiconductor Location Address Corporate HQ 2180 Fortune Drive San Jose, CA 95131 USA Telephone Fax +1 408 944 0800 +1 408 944 0970 Western USA 2180 Fortune Drive San Jose, CA 95131 USA +1 408 944 0800 +1 408 944 0970 Central USA 2425 N. Central Express Way, Suite 351 Richardson, TX 75080 USA +1 972 393 2533 +1 408 474 1210 Eastern USA 93 Branch Street Medford, NJ 08055 USA +1 609 654 0078 +1 609 654 0989 Latin America 2425 N. Central Express Way, Suite 351 Richardson, TX 75080 USA +1 972 393 2533 +1 408 474 1210 China Rm 601, Bldg B, Int’l Chamber of Commerce Mansion, Fuhua Rd 1 Futian Dist Shenzhen, P.R. 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TEL: 1.408.944.0800 FAX: 1.408.474.1000 HTTP:// www.micrel.com Rev. 1.6 Stock Code: M1028-020807