Zilog EZ80190 - Manual (Page 63)

eZ80190 Development Kit
User Manual
UM014108-0810 Difference Between EMAC and IP Address
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On a Local Area Network or other network, the MAC address is the com-
puter's unique hardware number. (On an Ethernet LAN, the MAC address
is the same as an Ethernet address.) When it is connected to the Internet, a
computer (or host as the Internet protocol considers it), a correspondence
table relates the Internet Protocol (IP) address to the computer's physical
(MAC) address on the LAN.
IP Address
An IP address is a 32-bit number that identifies each sender or receiver of
information that is sent in packets across the Internet.
An IP address contains two parts: the identifier of a particular network on
the Internet, and an identifier of the particular device (which can be a
server or a workstation) within that network. On the Internet itself—that
is, between the router that moves packets from one point to another along
the route—only the network part of the address is examined.
Relationship of the IP Address to the Physical Address
The machine or physical address used within an organization's local area
networks can be different than the IP address coming from the Internet.
The most typical example is the 48-bit Ethernet address. TCP/IP includes
the Address Resolution Protocol (ARP) that lets the administrator create a
table that maps IP addresses to physical addresses.
The Ethernet MAC address of the ZPAK II
When connecting the ZPAK II serial port to a PC running HyperTerminal,
hold the space bar and reset the ZPAK II.
When HyperTerminal prompts with
eZ80>
enter e to display the MAC address.