Product category:
VMEbus Boards and Assemblies
News Release from: Acal Microsystems | Subject: PMC-Gigabit-DTX and PMC-Gigabit-DFX
Edited by the Electronicstalk Editorial
Team on 07 December 2001
PMC cards doubles Gigabit Ethernet
density
Crellon Microsystems has introduced two new PMC modules for high density Gigabit Ethernet networking.
Crellon Microsystems has introduced two new PMC modules for high density Gigabit Ethernet networking The PMC-Gigabit-DTX features dual 1000BaseT ports, and the PMC-Gigabit-DFX features multimode fibre-optic support to allow high-performance upgrades while preserving software written for existing Ethernet applications
This article was originally published on Electronicstalk on 3 May 2001 at 8.00am (UK)
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The new modules, developed by SBS Technologies, are suitable for rack and single board computer applications, enabling high-density Gigabit Ethernet with maximum utilisation of each provisioned PMC slot.
They deliver double the density of current Gigabit Ethernet ports and increase performance over the existing SBS family of PMC products, including the PMC-Gigabit-SF and PMC-Gigabit-ST that offer single interface ports.
The main beneficiaries are applications requiring high-speed data throughput and low latency transmission.
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Both the PMC-Gigabit-DTX and PMC-Gigabit-DFX offer two high-performance PMC interface controller ports and two Gigabit Ethernet interfaces using two Intel 82543 Gigabit Ethernet controllers.
These two controllers interface to the PMC bus via an Intel 21154 bridge chip supporting 32 and 64bit PCI up to 66MHz.
The PMC-Gigabit-DTX, featuring dual 1000BaseT ports, includes 64Kbyte of FIFO buffer memory allowing back-to-back transmissions with minimum interface latency.
It also features a 10BaseTx, 100BaseTx and 1000BaseT auto-detection CSMA/CD interface controller.
The physical interface is supported via Marvell 88E1020 PHY.
It offers a number of sophisticated features, including auto negotiation, collision detection, link detection, 4B/5B encoding/decoding (100BaseTx) and scrambling/descrambling (100BaseTx), half duplex/full duplex.
Standard network connection is accomplished through two front-panel RJ45 connectors.
The module is compliant with standard single-width PMC IEEE P1386.1 and PCI 2.2 specifications.
The DTX complies with the IEEE 802.3 specification for 10BaseTx, 100BaseTx and IEEE 802.3ab specification for 1000BaseT over category 5 twisted pair cable.
Full-duplex mode fully supported.
Half-duplex mode supported in 10BaseTx and 100BaseTx.
The PMC-Gigabit-DFX offers multimode fibre-optic technology and includes 64Kbyte of receive/transmit FIFO buffer memory, allowing back-to-back transmissions with minimum interface latency.
The physical interface is supported via the Vitesse VSC7123.
Standard network connection is accomplished through two front panel-mounted multimode fibre transceivers meeting LC form factor.
The module is compliant with standard single-width PMC IEEE P1386.1 and PCI 2.2 specifications.
The DFX complies with the IEEE 802.3z specification.
Full-duplex mode is supported.
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