The COM82C501 Ethernet™ Serial Interface (ESI) chip is designed to work directly with the COM82586 LAN Coprocessor in IEEE 802.3 (10BASE5 and 10BASE2), 10Mbps, Local Area Network Applications. The major functions of the COM82C501 are to generate the 10 MHz transmit clock for the COM82586, perform Manchester encoding/decoding of the transmitted/received frames, and provide the electrical interface to the Ethernet™ transceiver cable(AUI). Diagnostic loopback control enables the COM82C501 to route the signal to be transmitted from the COM82586 through its Manchester encoding and decoding circuitry and back to the COM82586 and COM82C501 result in efficient fault the communications interface.An on-chip watchdog timer a continuous transmit mode. The COM82C501 is socket compatible with the bipolar Intel 82501, the Seeq 8023A, and the CMOS Intel 82C501.
