CY7B8392

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. The two consecutive ones at the end of the preamble signify the start of frame packet and are sometimes referred to as the Start of Frame Delimiter. The destination address is a 6-byte field that specifies the station(s) to which the packet is being sent. Every station examines this field and determines whether it should accept the packet. The high-order bit of the destination address is a zero for ordinary addresses and one for group (multicast) addresses. Group addresses allow multiple stations to listen to one address. The source address is a 6 byte field that contains the unique address of the station that is transmitting the packet. The length field is used to determine how many bytes are in the da...