Intel PXA270, Optimization Manual

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Intel® PXA27x Processor Family Optimization Guide Glossary-5
Endpoint See device endpoint.
Endpoint Address The combination of an endpoint number and an endpoint direction on a USB device. Each
endpoint address supports data transfer in one direction.
Endpoint Direction The direction of data transfer on the USB. The direction can be either IN or OUT. IN refers to
transfers to the host; OUT refers to transfers from the host.
Endpoint Number A four-bit value between 0H and FH, inclusive, associated with an endpoint on a USB device.
Envelope detector An electronic circuit inside a USB device that monitors the USB data lines and detects certain
voltage related signal characteristics.
EOF
End-of-(micro)Frame.
EOP End-of-Packet.
EOTD Enhanced Observed Time Difference
ETM Embedded Trace Macrocell, the ARM* real-time trace capability
External Port See port.
Eye pattern A representation of USB signaling that provides minimum and maximum voltage levels as well as
signal jitter.
FAR Fault Address Register, part of the ARM* architecture.
False EOP A spurious, usually noise-induced event that is interpreted by a packet receiver as an EOP.
FDD The Mobile Station transmits on one frequency; the Base Station transmits on another frequency
FDM Frequency Division Multiplexing. Each Mobile station transmits on a different frequency (within a cell).
FDMA Frequency Division Multiple Access. An analog standard that lets multiple users access a group of radio
frequency bands and eliminates interference of message traffic.
FHSS See Frequency Hopping Spread Spectrum.
FIQ
Fast Interrupt Request. See Interrupt Request.
Frame A 1 millisecond time base established on full-/low-speed buses.
Frame Pattern A sequence of frames that exhibit a repeating pattern in the number of samples transmitted per
frame. For a 44.1 kHz audio transfer, the frame pattern could be nine frames containing 44 samples followed by one
frame containing 45 samples.
Frequency Hopping Spread Spectrum A method by which a carrier spreads out packets of information (voice or
data) over different frequencies. For example, a phone call is carried on several different frequencies so that when
one frequency is lost another picks up the call without breaking the connection.
Fs See sample rate.
FSR Fault Status Register, part of the ARM* architecture.
Full-duplex Computer data transmission occurring in both directions simultaneously.