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| www.micrel.com KSZ8842-16MQL KSZ8842-32MQL Product Brief 2-Port Ethernet Switch with Non-PCI Interface Description 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. Benefits 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(R) 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 HP Auto MDI/MDI-X 1K Look-up Engine 10/100 T/TX PHY 1 10/100 MAC 1 FIFO, Flow Control, VLAN Tagging, Priority HP Auto MDI/MDI-X 10/100 T/TX PHY 2 10/100 MAC 2 Queue Management DMA Channel Embedded Processor Interface Buffer Management Non-PCI CPU Bus Interface Unit Frame Buffers 8,16, 32-bit Generic Host Interface MIB Counters Control Registers EEPROM Interface 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 Features Switch Management * 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 Comprehensive Register Access * Control registers configurable on the fly (port-priority, 802.1p/d/q) 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 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 Monitoring * 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 Markets * Fast Ethernet * Embedded Ethernet * Industrial Ethernet For additional information, contact your local Micrel Field Application Engineer or salesperson. Contact Micrel Semiconductor Location Corporate HQ Western USA Central USA Eastern USA Latin America China Japan Korea New Zealand Singapore/India Taiwan UK/EMEA France/Southern Europe Sweden/Nordic Address 2180 Fortune Drive 2180 Fortune Drive 2425 N. Central Express Way, Suite 351 93 Branch Street 2425 N. Central Express Way, Suite 351 Rm 601, Bldg B, Int'l Chamber of Commerce Mansion, Fuhua Rd 1 Futian Dist Queens Tower 14F, 2-3-1, Minatomirai, Nishi-ku, Yokohama-shi 8F, AnnJay Tower Bldg, 718-2, Yeoksam-dong, Kangnam-ku Office 2, CML Bldg, 2 Perry Street 300 Beach Road, #10-07 The Concourse 4F, No. 18 Lane 321, Yang-Guang Street, Nei-Hu Chu 1st Floor, 3 Lockside Place, Mill Lane, Newbury, Berks 10 Avenue du Quebec, Villebon - B.P. 116, 91944 Courtaboeuf Cedex Lundagatan 11 6tr, SE-171 63 Solna San Jose, CA 95131 USA San Jose, CA 95131 USA Richardson, TX 75080 USA Medford, NJ 08055 USA Richardson, TX 75080 USA Shenzhen, P.R. China 518048 Kanagawa 220-8543, Japan Seoul 135-080, Korea Masterton, New Zealand Singapore 199555 Taipei 11475 Taiwan, R.O.C United Kingdom RG14 5QS France Sweden Telephone +1 408 944 0800 +1 408 944 0800 +1 972 393 2533 +1 609 654 0078 +1 972 393 2533 +86 755 8302 7618 +81 45 224 6616 +82 2 538 2380 +64 6 378 9799 +65 6291 1318 +866 2 8751 0600 +44 1635 524455 +33 1 60 92 4190 +46 8 470 5950 Fax +1 408 944 0970 +1 408 944 0970 +1 408 474 1210 +1 609 654 0989 +1 408 474 1210 +86 755 8302 7637 +81 45 224 6716 +82 2 538 2381 +64 6 378 9599 +65 6291 1332 +866 2 8751 0746 +44 1635 524466 +33 1 60 92 4189 +46 8 470 5950 Micrel, Inc. TEL: 1.408.944.0800 FAX: 1.408.474.1000 HTTP:// www.micrel.com Rev. 1.6 Stock Code: M1028-020807 |
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