This is a PCI Ethernet controller developed by AMD, which supports 10/100Mbps transmission rate.
The Am79C973 and Am79C975 are single‑chip 32‑bit PCI Ethernet controllers that integrate a full‑duplex 10/100 Mbps PHY. They offer a glueless PCI host interface, extensive programmable buffers, and support for both 5 V and 3.3 V PCI signaling environments.
The document details block diagrams, pin assignments for PQFP and TQFP packages, register maps, power‑management features, and the optional Serial Management Interface for remote monitoring. It also includes ordering information and compatibility with the PCnet family of Ethernet controllers.
| Interface type | Single‑Chip 10/100 Mbps PCI Ethernet Controller |
|---|---|
| PCI host interface | 32‑bit glueless |
| PCI clock support | DC to 33 MHz |
| PCI voltage support | 5.0 V and 3.3 V |
| Internal buffer size | 12 KB |
| Integrated transceiver | 10BASE‑T with on‑chip filtering |
| Fiber interface | PECL for 100BASE‑FX |
| Remote wake‑up | Magic Packet™ technology |
It uses a 32‑bit glueless PCI host interface.
The controller includes 12 KB of internal buffers.
Yes, it supports both PCI 5.0 V and 3.3 V environments.