AM79C971 Datasheet | Advanced Micro Devices

PCnet™-FAST Single-Chip Full-Duplex 10/100 Mbps Ethernet Controller for PCI Local Bus DISTINCTIVE CHARACTERISTICS s Single-chip Fast Ethernet controller for the Peripheral ponent Interconnect (PCI) local 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 2.1 pliant - Supports PCI Subsystem/Subvendor ID/ Vendor ID programming through the EEPROM interface - Supports both PCI 5.0-V and 3.3-V signaling environments - Plug and Play patible - Supports an unlimited PCI burst length - Big endian and little endian byte alignments supported s Integrated 10BASE-T and 10BASE-2/5 (AUI) Physical Layer Interface - Single-chip IEEE/ANSI 802.3, IEC/ISO 8802-3 and Blue Book Ethernet-pliant solution - Automatic Twisted-Pair receive polarity detection and correction - Internal 10BASE-T transceiver with Smart Squelch to Twisted-Pair medium - IEEE 802.3-pliant auto-negotiable 10BASE-T interface s Supports General Purpose Serial Interface (GPSI) s Media Independent Interface (MII) for connecting external 10- or 100-Megabit per second (Mbps) transceivers - IEEE 802.3-pliant MII - Intelligent Auto-Poll™ external PHY status monitor and interrupt - Includes intelligent on-chip Network Port Manager that provides auto-port selection between MII, on-chip 10BASE-T port, and AUI without software support - Supports both auto-negotiable and non auto-negotiable external PHYs - Supports 10BASE-T, 100BASE-TX/FX, 100BASE-T4, and 100BASE-T2 IEEE 802.3pliant MII PHYs at full- or half-duplex s Internal/external loopback capabilities on all ports s Supports patented External Address Detection Interface (EADI) - Receive frame tagging support for internetworking applications s Dual-speed CSMA/CD...