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  2. Serial Peripheral Interface - Wikipedia

    en.wikipedia.org/wiki/Serial_Peripheral_Interface

    Quad SPI (QSPI; different to but has same abbreviation as Queued-SPI described in § Intelligent SPI controllers) goes beyond dual SPI, adding two more I/O lines (SIO2 and SIO3) and sends 4 data bits per clock cycle. Again, it is requested by special commands, which enable quad mode after the command itself is sent in single mode.

  3. Chip select - Wikipedia

    en.wikipedia.org/wiki/Chip_select

    An example SPI with a master and three slave select lines. Note that all four chips share the SCLK, MISO, and MOSI lines but each slave has its own slave select. Chip select (CS) or slave select (SS) is the name of a control line in digital electronics used to select one (or a set) of integrated circuits (commonly called "chips") out of several connected to the same computer bus, usually ...

  4. Power management integrated circuit - Wikipedia

    en.wikipedia.org/wiki/Power_management...

    Some models feature I²C or SPI serial bus communications interface for I/O. Some models feature a low-dropout regulator (LDO), and a real-time clock (RTC) co-operating with a backup battery. A PMIC can use pulse-frequency modulation (PFM) and pulse-width modulation (PWM). It can use switching amplifier (Class-D electronic amplifier).

  5. Embedded software - Wikipedia

    en.wikipedia.org/wiki/Embedded_software

    Embedded software is computer software, written to control machines or devices that are not typically thought of as computers, commonly known as embedded systems. It is typically specialized for the particular hardware that it runs on and has time and memory constraints. [1] This term is sometimes used interchangeably with firmware. [2]

  6. SPI - Wikipedia

    en.wikipedia.org/wiki/SPI

    Indian Protection Service (Serviço de Proteção ao Índio), Brazil; Shotmed Paper Industries, an Egyptian paper manufacturers; Simulations Publications, Inc., a former US board game publisher

  7. Bit banging - Wikipedia

    en.wikipedia.org/wiki/Bit_banging

    Bit banging is a term of art that describes a method of digital data transmission as using general-purpose input/output (GPIO) instead of computer hardware that is intended specifically for data communication.' [1] Controlling software is responsible for satisfying protocol requirements including timing which can be challenging due to limited host system resources and competing demands on the ...

  8. System Packet Interface - Wikipedia

    en.wikipedia.org/wiki/System_Packet_Interface

    Devices implementing SPI are typically specified with line rates of 700~800 Mbit/s and in some cases up to 1 Gbit/s. The latest version is SPI 4 Phase 2 also known as SPI 4.2 delivers bandwidth of up to 16 Gbit/s for a 16 bit interface. The Interlaken protocol, a close variant of SPI-5 replaced the System Packet Interface in the marketplace.

  9. JTAG - Wikipedia

    en.wikipedia.org/wiki/JTAG

    JTAG (named after the Joint Test Action Group which codified it) is an industry standard for verifying designs of and testing printed circuit boards after manufacture.. JTAG implements standards for on-chip instrumentation in electronic design automation (EDA) as a complementary tool to digital simulation. [1]