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KS8842-16MQL Datasheet(PDF) 1 Page - Micrel Semiconductor |
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KS8842-16MQL Datasheet(HTML) 1 Page - Micrel Semiconductor |
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1 / 1 page Micrel Semiconductor TEL: 1.408.944.0800 FAX: 1.408.474.1000 HTTP:// www.micrel.com Queue Management Buffer Management Frame Buffers 10/100 MAC 1 10/100 MAC 2 10/100 T/TX PHY 1 10/100 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 LinkMDTM 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: –40oC 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 Diagram Block Diagram Block Diagram Block Diagram Block 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 applications • Port redundancy and port monitoring • Security cameras • VoIP phone and ATA adaptors |
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