参数资料
型号: RCPXA270C0C520
厂商: MARVELL SEMICONDUCTOR INC
元件分类: 微控制器/微处理器
英文描述: 520 MHz, MICROPROCESSOR, PBGA356
封装: 13 X 13 MM, 1 MM HEIGHT, 0.50 MM PITCH, VFBGA-356
文件页数: 16/128页
文件大小: 1560K
代理商: RCPXA270C0C520
Glossary-2
Electrical, Mechanical, and Thermal Specification
Intel PXA270 Processor
Glossary
BGA: Ball Grid Array
BFSK: binary frequency shift keying. A coding scheme for digital data.
Bit: A unit of information used by digital computers. Represents the smallest piece of addressable memory within a
computer. A bit expresses the choice between two possibilities and is typically represented by a logical one (1) or
zero (0).
Bit Stuffing: Insertion of a “0” bit into a data stream to cause an electrical transition on the data wires, allowing a
PLL to remain locked.
Blackberry: A two-way wireless device (pager) made by Research In Motion (RIM) that allows users to check
e-mail and voice mail translated into text, as well as page other users of a wireless network service. It has a
miniature “qwerty” keyboard that can be used by your thumbs, and uses SMS protocol. A Blackberry user must
subscribe to the proprietary wireless service that allows for data transmission.
Bluetooth: A short-range wireless specification that allows for radio connections between devices within a 30-foot
range of each other. The name comes from 10th-century Danish King Harald Blatand (Bluetooth), who unified
Denmark and Norway.
BPSK: binary phase shift keying. A means of encoding digital data into a signal using phase-modulated
communications.
b/s: Transmission rate expressed in bits per second.
B/s: Transmission rate expressed in bytes per second.
BTB: Branch Target Buffer
BTS: Base Transmitter Station
Buffer: Storage used to compensate for a difference in data rates or time of occurrence of events, when transmitting
data from one device to another.
Bulk Transfer: One of the four USB transfer types. Bulk transfers are non-periodic, large bursty communication
typically used for a transfer that can use any available bandwidth and can also be delayed until bandwidth is
available. See also transfer type.
Bus Enumeration: Detecting and identifying USB devices.
Byte: A data element that is eight bits in size.
Capabilities: Those attributes of a USB device that are administrated by the host.
CAS: Cycle Accurate Simulator
CAS-B4-RAS: See CBR.
CBR: CAS Before RAS. Column Address Strobe Before Row Address Strobe. A fast refresh technique in which
the DRAM keeps track of the next row it needs to refresh, thus simplifying what a system would have to do to
refresh the part.
CDMA: Code Division Multiple Access U.S. wireless carriers Sprint PCD and Verizon use CDMA to allocate
bandwidth for users of digital wireless devices. CDMA distinguishes between multiple transmissions carried
simultaneously on a single wireless signal. It carries the transmissions on that signal, freeing network room for the
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