Bandwidth:

Total amount of data accross out of a device or across an interface per unit time. (usually Bytes/sec)

Latency:

A measure of the time from a request for a data transfer until the data is received.

Memory Interfaces for Acessing Data

Asynchronous (unclocked):

A change in the address results in data appearing

Synchronous (clocked):

A change in address, followed by an edge on CLK results in data appearing. Somtimes, multiple request may be outstanding.

Volatile:

Looses its state when the power goes off.