NHPXA270C5C520 Intel, NHPXA270C5C520 Datasheet - Page 119

• Manufacturer Part Number: NHPXA270C5C520
• Description: IC MPU 32BIT 520MHZ 356-PBGA
• Manufacturer: Intel

Specifications of NHPXA270C5C520

• Processor Type: XScale®
• Speed: 520MHz
• Voltage: 1.45V
• Mounting Type: Surface Mount
• Package / Case: 356-PBGA
• For Use With: 460-3472 - KIT DEV ZOOM STARTER FOR PXA270
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Features: -
• Other names: 868459

Intel® PXA270 Processor
Glossary
OFDM: See Orthogonal Frequency Division Multiplexing.
Orthogonal Frequency Division Multiplexing: A special form of multi-carrier modulation. In a multi-path
channel, most conventional modulation techniques are sensitive to inter-symbol interference unless the channel
symbol rate is small compared to the delay spread of the channel. OFDM is significantly less sensitive to
inter-symbol interference, because a special set of signals is used to build the composite transmitted signal. The
basic idea is that each bit occupies a frequency-time window that ensures little or no distortion of the waveform. In
practice, it means that bits are transmitted in parallel over a number of frequency-nonselective channels.
Packet: A bundle of data organized in a group for transmission. Packets typically contain three elements: control
information (for example, source, destination, and length), the data to be transferred, and error detection and
correction bits. Packet data is the basis for packet-switched networks, which eliminate the need to dial-in to send or
receive information, because they are “always on.”
Packet Buffer: The logical buffer used by a USB device for sending or receiving a single packet. This determines
the maximum packet size the device can send or receive.
Packet ID (PID): A field in a USB packet that indicates the type of packet, and by inference, the format of the
packet and the type of error detection applied to the packet.
Packet Switched Network: Networks that transfer packets of data.
PCMCIA: Personal Computer Memory Card Interface Association (PC Card)
PCS: Personal Communications services. An alternative to cellular, PCD works like cellular technology because it
sends calls from transmitter to transmitter as a caller moves. But PCS uses its own network, not a cellular network,
and offers fewer “blind spots” than cellular, where calls are not available. PCS transmitters are generally closer
together than their cellular counterparts.
PDA: Personal Digital Assistant. A mobile handheld device that gives users access to text-based information. Users
can synchronize their PDAs with a PC or network; some models support wireless communication to retrieve and
send e-mail and get information from the Internet.
Phase: A token, data, or handshake packet. A transaction has three phases.
Phase Locked Loop (PLL): A circuit that acts as a phase detector to keep an oscillator in phase with an incoming
frequency.
Physical Device: A device that has a physical implementation; for example, speakers, microphones, and CD
players.
PID: See Packet ID or Process ID.
PIO: Programmed input/output
Pipe: A logical abstraction representing the association between an endpoint on a device and software on the host.
A pipe has several attributes; for example, a pipe may transfer data as streams (stream pipe) or messages (message
pipe). See also stream pipe and message pipe.
PLL: See Phase Locked Loop.
PM: Phase Modulation.
Polling: Asking multiple devices, one at a time, if they have any data to transmit.
POR: See Power On Reset.
Electrical, Mechanical, and Thermal Specification
Glossary-9