Specifications

CHAPTER 1. INTRODUCTION
This chapter provides a brief introduction to the ZT 6650 CompactPCI™ Fast Ethernet Interface. It
includes a product definition and a listing of product features. You will find unpacking information and
installation instructions in Chapter 2, "Getting Started."
PRODUCT DEFINITION
The ZT 6650 is a fast Ethernet LAN controller for either 10BASE-T or 100BASE-TX data rates
providing a direct interface to the CompactPCI™ local bus. The interface is based on Digital
Semiconductor's™ DEC™21140A PCI Fast Ethernet LAN Controller chip, a single-chip master,
direct memory access (DMA) Fast Ethernet controller set up to minimize host CPU utilization and bus
traffic.
The ZT 6650 interfaces to the host processor by using onchip command and status registers and a
shared host memory area, set up during initialization. This minimizes processor involvement in the
21140A operation during normal reception and transmission. Bus traffic is also minimized by filtering
out received runt frames and by automatically retransmitting collided frames without a repeated fetch
from the host memory.
FEATURES OF THE ZT 6650
• 32-bit bus mastering design allows maximum throughput without loading the host CPU
• Installs easily with plug and play auto-configuration
• Easily visible LEDs indicate 100BASE-TX operation, plus receive and transmit activity
• National Semiconductor's NWay™ auto-negotiation feature determines 10 Mbits/s operation and
100 Mbits/s operation, in either half or full duplex
• Supports full duplex mode for 20 or 200 Mbits/s operation
• 100% compliant with IEEE 802.3 10BASE-T and 802.3u 100BASE-TX Ethernet standards
• Jumperless and switchless operation
• Compliant with CompactPCI specification 1.0
• 132 Mbits/s data transfer rate through the 32-bit PCI bus
• Remote boot ROM socket allows diskless workstation to boot from LAN server
• Five year warranty and free technical support
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