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Appendix A Glossary
Broadcast MAC Address — A special Ethernet MAC address used to send data to all Ethernet devices on the local network. The broadcast address is
Descriptor (Packet Buffer Descriptor) — A small memory structure that describes a larger block of memory in terms of size, location, and state. Descriptors are used by the EMAC and application to describe the memory buffers that hold Ethernet data.
Device — In this document, device refers to the TMS320DM643x processor.
Ethernet MAC Address (MAC Address) — A unique
The first three bytes normally designate the manufacturer of the device. However, when the first byte of the address is odd (LSB is 1), the address is a group address (broadcast or multicast). The second bit specifies whether the address is globally or locally administrated (not considered in this document).
Ethernet Packet (Packet) — An Ethernet packet is the collection of bytes that represents the data portion of a single Ethernet frame on the wire.
Full Duplex —
∙The physical medium is capable of supporting simultaneous transmission and reception without interference.
∙There are exactly two stations connected with a full duplex
∙Both stations on the LAN are capable of, and have been configured to use,
The most common configuration envisioned for
Half Duplex — In
Host — The host is an intelligent system resource that configures and manages each communications control module. The host is responsible for allocating memory, initializing all data structures, and responding to port (EMAC) interrupts. In this document, host refers to the TMS320DM643x device.
Jabber — A condition wherein a station transmits for a period of time longer than the maximum permissible packet length, usually due to a fault condition.
SPRU941A | Glossary | 117 |