21-40756-01 DECchip 21041 PCI Ethernet LAN Controller

The 21041 has a single 50-pin connection, which consists of the control and address/data signals of a PCI bus. The 21041 provides complete implementation of the IEEE 802.3 Ethernet specification from the attachment unit interface (AUI) and the twisted-pair (10BASE-T) interface through the media access control (MAC) layer, and creates a direct interface to the PCI bus. The PCI interface operates on the bus and uses approximately 1% of the bus bandwidth during an Ethernet reception or transmission. The bus master design provides for high throughput between the system and the network, yet it requires only a minimum of components for a complete implementation.

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