KS8842-16MQL MICREL | Alldatasheet

Document overview

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Technical content

FIFO, Flow Control, VLAN Tagging, Priority MAC 1 MAC 2 T/TX PHY 1 T/TX PHY 2 EEPROM Interface HP Auto MDI/MDI-X HP Auto MDI/MDI-X MIB Counters P1 LED[3:0] P2 LED[3:0] EEPROM I/F Non-PCI CPU Bus Interface Unit Embedded Processor Interface 8/16/32 Bit Generic Host Interface Control Registers Drivers LED 1K Look-Up Engine DMA Channel Benefits Offers all of the features of an integrated Layer 2 managed switch plus:

  • Fully compliant to the IEEE 802.3u 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 8/16/32 bit generic host processor interface
  • Micrel LinkMD TM cable diagnostic capabilities to determine cable length, diagnose faulty cables, and determine distance to fault
  • HP Auto MDI-X crossover with disable and enable option
  • Industrial Temperature support: –40 oC to +85oC available from Q4
  • Four priority queues to handle voice, video, data, and control packets www.micrel.com Note: For an MII/RMII, I2C or SPI interface, use the KS8883ML. LinkMD is a trademark of Micrel, Inc.

Description

The KS8842M is the industry’s first fully managed 2-port switch with a non-PCI CPU interface. The KS8842 is a proven, 4th generation, integrated Layer 2 switch that is compliant to the IEEE 802.3u standard. The KS8842M can also be configured as a low-latency repeater to allow for ‘cut thru’ in latency critical Embedded or Industrial Ethernet applications. For industrial automa- tion applications in the repeater mode, the KS8842M runs in half-duplex mode regardless of the application. The KS8842M 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 emerg- ing Fast Ethernet applications. The KS8842 contains two 10/100 transceivers with pat- ented mixed-signal low-power technology, two media ac- cess control (MAC) units and a direct memory access (DMA) channel, a high-speed non-blocking switch fabric, a dedicated 1K entry forwarding table, and an on-chip frame buffer memory. Block DiagramBlock DiagramBlock DiagramBlock DiagramBlock Diagram KS8842-16MQL KS8842-32MQL Product Brief 2-Port Ethernet Switch with Non-PCI Interface

Applications

  • Industrial applications for daisy chaining multiple devices
  • Industrial control in latency critical
  • Port redundancy and port monitoring
  • Security cameras
  • VoIP phone and ATA adaptors