AM79C976

PRELIMINARY Am79C976 PCnet-PRO™ 10/100 Mbps PCI Ethernet Controller DISTINCTIVE CHARACTERISTICS s Integrated Fast Ethernet controller for the Peripheral Component Interconnect (PCI) bus — 32-bit glueless PCI host interface — Supports PCI clock frequency from DC to 33 MHz independent of network clock — Supports network operation with PCI clock from 15 MHz to 33 MHz — High performance bus mastering architecture with integrated Direct Memory Access (DMA) Buffer Management Unit for low CPU and bus utilization — PCI specification revision 2.2 compliant — Supports PCI Subsystem/Subvendor ID/Vendor ID programming through the EEPROM interface — Supports both PCI 3.3-V and 5.0-V signaling environments — Plug and Play compatible — Uses advanced PCI commands (MWI, MRL, MRM) — Optionally supports PCI bursts aligned to cache line boundaries — Supports big endian and little endian byte alignments — Implements optional PCI power management event (PME) pin — Supports 40-bit addressing (using PCI Dual Address Cycles) s Media Independent Interface (MII) for connecting external 10/100 megabit per second (Mbps) transceivers — IEEE 802.3-compliant MII — Intelligent Auto-Poll™ external PHY status monitor and interrupt — Supports both auto-negotiable and non autonegotiable external PHYs — Supports 10BASE-T, 100BASE-TX/FX, 100BASE-T4, and 100BASE-T2 IEEE 802.3compliant MII PHYs at full- or half-duplex s Full-duplex operation supported with independent Transmit (TX) and Receive (RX) channels s Inclu...