Intel PXA27 Series Design Manual page 288

Glossary
RTS. Request-To-Send. When low, signals the modem or data set that the UART is ready to exchange data.
SA-1110. StrongARM* based applications processor for handheld products
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Intel StrongARM* SA-1111. Companion chip for the Intel® SA-1110 processor
SAD. Sum of absolute differences
Sample. The smallest unit of data on which an endpoint operates; a property of an endpoint.
Sample Rate (Fs). The number of samples per second, expressed in Hertz (Hz).
Sample Rate Conversion (SRC). A dedicated implementation of the RA process for use on sampled analog data
streams. The error control mechanism is replaced by interpolating techniques. Service A procedure provided by a
System Programming Interface (SPI).
Satellite Phone. Phones that connect callers by satellite. Users have a world-wide alternative to terrestrial
connections. Typical use is for isolated users, such as crews of deep-sea oil rigs with phones configured to connect
to a satellite service.
SAV. Start of Active Video
SAW. Surface Acoustic Wave filter.
SD. Secure Digital. A non-volatile and very small memory card with high-storage capacity.
SDIO. See Secure Digital I/O
SDRAM. Synchronous Dynamic Random Access Memory
Secure Digital I/O (SDIO). Protocol provides high-speed data I/O with low-power consumption. The card
supports multiple I/O functions, interrupts, and read/write operations.
SEO. Single-Ended Zero. The USB uses differential signals (D+ and D-) to transmit and receive data. The SEO can
be set to control the multiplexors.
Service Interval. The period between consecutive requests to a USB endpoint to send or receive data.
Service Jitter. The deviation of service delivery from its scheduled delivery time.
Service Rate. The number of services to a given endpoint per unit time.
SIMD. Single Instruction Multiple Data. A parallel processing architecture.
Smart Phone. A combination of a mobile phone and a PDA, which allow users to communicate as well as perform
tasks; such as, accessing the Internet and storing contacts in a database. Smart phones have a PDA-like screen.
SMROM. Synchronous Mask ROM
SMS. Short Messaging Service. A service through which users can send text-based messages from one device to
another. The message can be up to 160 characters and appears on the screen of the receiving device. SMS works
with GSM networks.
SOC. System-On-Chip
SOF. See Start-of-Frame.
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Glossary-12 Intel PXA27x Processor Family Design Guide