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CY7B8392 Low Power Ethernet Coaxial Transceiver Application
This application note describes the differences between the 10BASE5 (Ethernet) and 10BASE2 (Cheapernet) versions of the IEEE 802.3 standard, and provides guidelines for design with the CY7B8392. Data is sent out over the network in packets. An Ethernet packet consists of the preamble, destination address, source address, length field, data, and a Cyclic Redundancy Check (CRC). Each packet can be viewed as a sequence of 8-bit bytes, with the least significant bit of each byte being transmitted first. A typical Ethernet packet is shown in Figure 3. The preamble contains 8 bytes of alternating ones and zeros, ending with two consecutive ones. The preamble allows the receiving PLS to synchronize its clock with the sender.