Search results
Results from the WOW.Com Content Network
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
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.
[[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 character.
QuickPath Interconnect (QPI) by Intel (though this is an off-chip interface, not on-chip bus) virtual share from PICC - free and open source; TileLink - Free and open bus architecture from CHIPS Alliance [6]
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.
ROM size of 64 KB, which contains a boot loader with optional booting from USART0 / USART3, USB0 / USB1, SPI Flash, Quad SPI Flash, external 8 / 16/ 32-bit NOR flash. The ROM also contains an API for in-system programming, in-application programming, OTP programming, USB device stack for HID / MSC / DFU.
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.