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SPI bus

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SPI bus
(Serial Peripheral Interface bus) A four-line, synchronous, serial bus from Motorola that is widely used to connect a microcontroller to peripheral chips on a circuit board. Each device has one input line and one output line, and data are exchanged in full-duplex mode. SPI operates in a master-slave topology where the microcontroller is the master and clock controller, and the peripheral chips respond as slaves. SPI is typically faster than the I2C bus. See I2C bus.

SPI on a Microcontroller
This Ramtron microcontroller (MCU) includes controllers for both SPI and I2C buses for peripheral data transfer (note upper right of diagram). (Image courtesy of Ramtron International Corporation, www.ramtron.com)
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STMicroelectronics (NYSE:STM), a world leader in serial non- volatile memory ICs, has unveiled a new 1-Mbit serial EEPROM with SPI bus (serial peripheral interface) in the tiny SO8N package with 150-mil (3.
STMICROELECTRONICS UNVEILS 1-MBIT SERIAL EEPROM by Electro Manufacturing
Because the NFX has both SPI and USB interfaces, it can interface with an embedded microprocessor through its SPI bus and/or with a PC or embedded computer through its USB bus.
Datakey Electronics Releases New Development Kit for Award-Winning ... by Business Wire
PCF2123 Real-Time Clock Features Tiny Foot Print and Delivers Extremely Long Stand-by Time in Handheld Devices EINDHOVEN, The Netherlands -- Today, NXP Semiconductors, the independent company founded by Philips, announced the availability of the industry's best low-power performance real-time clock (RTC) chips with SPI bus interface, the PCF2123.
NXP Real-Time Clock Sets New Record in Power Efficiency by Business Wire
 
 
 
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