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KSZ8842-16MBL-EVAl Datasheet(PDF) 1 Page - Micrel Semiconductor |
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KSZ8842-16MBL-EVAl Datasheet(HTML) 1 Page - Micrel Semiconductor |
1 / 141 page KSZ8842-16/32 MQL/MVL/MVLI/MBL 2-Port Ethernet Switch with Non-PCI Interface Data Sheet Rev 1.9 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 October 2007 1 M9999-102207-1.9 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). This datasheet describes the KSZ8842M-series of non- PCI CPU interface chips. For information on the KSZ8842 PCI CPU interface switches, refer to the KSZ8842P datasheet. The KSZ8842M is the industry’s first fully managed, 2- port switch with a non-PCI CPU interface. It is based on a proven, 4 th generation, integrated Layer-2 switch, compliant with IEEE 802.3u standards. Also an industrial temperature grade version of the KSZ8842, the KSZ8842MVLI, can be ordered (see Ordering Information). The KSZ8842M can be configured as a switch or as a 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. LinkMD ® The KSZ8842M offers an extensive feature set that includes tag/port-based VLAN, quality of service (QoS) priority management, management information base (MIB) counters, and CPU control/data interfaces to effectively address Fast Ethernet applications. The KSZ8842M 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 an on-chip frame buffer memory. Functional Diagram P1 H P A u to MD I/ MD I - X P2 H P A u to MD I/ MD I - X E m b e d d e d P r o c e s s o r In te r fa c e 1K lo ok - u p En g in e S c he du lin g M a nag em en t B u ffe r M a n age m e nt Fr a m e B u ffe r s 10 /1 00 MA C 1 10 /1 00 MA C 2 Sw itc h Ho s t MA C 1 0 /1 00 B a s e - T/T X PH Y 1 1 0 /1 00 B a s e - T/T X PH Y 2 EEPR O M In te r fa c e LE D Dr iv e r s MIB Co u n te r s P 1 LE D [3: 0] P 2 LE D [3: 0] EEP R O M I/F N on- P C I CP U Bu s In te r fa c e Un i t QM U DM A C h an ne l Co n tr o l R e gis ter s RX Q 4K B 8 ,16 , or 32 - b it G e n e r i c H o st In te r fa c e TX Q 4K B Figure 1. KSZ8842M Functional Diagram |
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