Search results
Results from the WOW.Com Content Network
Push-pull drivers (as opposed to open drain) provide relatively good signal integrity and high speed; Higher throughput than I²C or SMBus. SPI's protocol has no maximum clock speed, however: Individual devices specify acceptable clock frequencies; Wiring and electronics limit frequency; Complete protocol flexibility for the bits transferred
The SPI 4.2 interface is composed of high speed clock, control, and data lines and lower speed FIFO buffer status lines. The high speed data line include a 16-bit data bus, a 1 bit control line and a double data rate (DDR) clock. The clock can run up to 500 MHz, supporting up to 1 GigaTransfer per second.
The physical phenomena on which the device relies (such as spinning platters in a hard drive) will also impose limits; for instance, no spinning platter shipping in 2009 saturates SATA revision 2.0 (3 Gbit/s), so moving from this 3 Gbit/s interface to USB 3.0 at 4.8 Gbit/s for one spinning drive will result in no increase in realized transfer rate.
Ultra-640 (otherwise known as Fast-320) was promulgated as a standard (INCITS 367-2003 or SPI-5) in early 2003. It doubles the interface speed yet again, this time to 640 MB/s. Ultra-640 pushes the limits of LVD signaling; the speed limits cable lengths drastically, making it impractical for more than one or two devices.
Synchronous Serial Interface (SSI) is a widely used serial interface standard for industrial applications between a master (e.g. controller) and a slave (e.g. sensor). SSI is based on RS-422 [1] standards and has a high protocol efficiency in addition to its implementation over various hardware platforms, making it very popular among sensor manufacturers.
To reduce the number of pins in a package, many ICs use a serial bus to transfer data when speed is not important. Some examples of such low-cost lower-speed serial buses include RS-232, DALI, SPI, CAN bus, I²C, UNI/O, and 1-Wire. Higher-speed serial buses include USB, SATA and PCI Express.
Initially, the SCSI Parallel Interface (SPI) was the only interface using the SCSI protocol. Its standardization started as a single-ended 8-bit bus in 1986, transferring up to 5 MB/s, and evolved into a low-voltage differential 16-bit bus capable of up to 320 MB/s.
SPI-4.2 is a version of the System Packet Interface published by the Optical Internetworking Forum.It was designed to be used in systems that support OC-192 SONET interfaces and is sometimes used in 10 Gigabit Ethernet based systems.