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A Queued Serial Peripheral Interface (QSPI; different to but has same abbreviation as Quad SPI described in § Quad SPI) is a type of SPI controller that uses a data queue to transfer data across an SPI bus. [19] It has a wrap-around mode allowing continuous transfers to and from the queue with only intermittent attention from the CPU.
Thus, Intel describes a 20-lane QPI link pair (send and receive) with a 3.2 GHz clock as having a data rate of 25.6 GB/s. A clock rate of 2.4 GHz yields a data rate of 19.2 GB/s. More generally, by this definition a two-link 20-lane QPI transfers eight bytes per clock cycle, four in each direction. The rate is computed as follows: 3.2 GHz
If the template has a separate documentation page (usually called "Template:template name/doc"), add [[Category:SPI templates]] to the <includeonly> section at the bottom of that page. Otherwise, add <noinclude>[[Category:SPI templates]]</noinclude> to the end of the template code, making sure it starts on the same line as the code's last ...
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.
Download as PDF; Printable version; ... [4] LPC1800 LPC1700 LPC1300: Cortex-M3 [5] LPC1200 ... SPI Flash, Quad SPI Flash, external 8 / 16/ 32-bit NOR flash. The ROM ...
UPI only supports directory-based coherency, unlike previous QPI processors which supported multiple snoop modes (no snoop, early snoop, home snoop, and directory). A combined caching and home agent (CHA) handles resolution of coherency across multiple processors, as well as snoop requests from processor cores and local and remote agents.
This template provides the instructions for users who enter a case and click a button at WP:SPI. It includes one parameter, which indicates the kind of introduction needed (NORMAL or CU). Because this works with transclusion, be careful to purge (forcibly update) the two pages it appears in, and test thoroughly, before using.
In contrast, Uncore functions include QPI controllers, L3 cache, snoop agent pipeline, on-die memory controller, on-die PCI Express Root Complex, and Thunderbolt controller. [3] Other bus controllers such as SPI and LPC are part of the chipset. [4] The Intel uncore design stems from its origin as the northbridge. The design of the Intel uncore ...