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1、 null ) null null M ICROPROCESSORS SPIV ! ! g ! 9喻小虎,咸德勇,陈华明(国防科技大学电子科学与工程学院导航研发中心,长沙 410073)null null K null 1 :串行外围设备接口 SPI( SerialPeripheral Interface)总线技术是Motorola公司推出的一种全双工a同步a串行数据接口标准b它能够实现在微控制器之间或微控制器与外部设备之间通信,具有接口线少a通讯效率高等特点,在集成电路设计中应用广泛b结合基于特定应用场合的SPI从设备设计,提出了 IP设计的基本概念,介绍了集成电路设计过程中,包括需求分析a
2、设计仿真a物理实现等在内的主要流程,并分析了实现低功耗设计a验证可靠性的一般方法b1 o M :串行外围设备接口;仿真验证;低功耗; IP设计 m s | : TP79null null D S M : Anull null c I | : 1002- 2279(2009)05- 0028- 03Design ofSP IS lave CircuitYU Xiao- hu, XIAN De- yong, CHEN Hua- ming(Research and D evelopemnt of Satellite Navigation Cen ter, college of E lectronic
3、 E ngineering,National University of Defense Technology, Chang sha 410073, China )null null Abstract: SerialPeripheral Interface (SPI) is a full- duplex synchronous serial bus, which is presnullented byMotorola Company. M icrocontroller can communicate w ith other microcontrollers or peripheraldevic
4、es by this interface. The characteristic of SPI is less- w ired and more efficient in the communicanulltion, which makeSPI popular in integrated circuit designs. The basic conception of Intellectual Property( IP) is described in this paper, based on the application specified slave device of SPI. Thi
5、s paper alsointroduces the design flow of the integrated circui,t included requirement analyze, logic design, simulationand physical implementation, and the generalmethod of low power design and reliability verification.Key words: SPI( SerialPeripheral Interface); Simulation; Low power; IP design1nu
6、ll null 1 ! ! g SPI( Serial Peripheral Internullface)9 L / Motorola w B a a1 g S b ? L C e W e ! ! W Y , g L aY r q + b! 9 VerilogHDLL C SPI9 L IPb IP SPI g L Y RF 8 7 ? IP, e RF W b2null SPI9 L SPI1 9 L 4 | L :1 H L( SCK)a /V L (M ISO)a /V L (MOSI)a r P ? | L(NCS)bSCKL z ; MOSI LV ,T V ; M ISO L .
7、V ,T ; NCSe L V 4 e b 3 4 | L V Z SPI g I/O q b m 1 U bSPI9 L / + :1) L ,e ! 9 bi 9 L Z ZE Y 1 8 L a8 16 L a2 3 e L b7 ! 9 , 4 e L V i Z L C ? b2) q d B I ,i d 1 , T SPI z b3) q T N d B ? S ,P d q z Y bT e : l (1982- ),3 , i ,p V 3 , = , Z _ :3 T d ! 9 a ! 9 _ bl : 2008- 10- 11 52009M 10 nullnullNo.
8、 5Oct. , 2009 l : SPIV ! ! g ! 9m 1null SPI d F 3null 9 L x p3. 1null x p SPI9 L Y , V ! ! W SPI g H M A d B , H M B , ? $ ? l b d l ,? H 1, b= SCK ;? H M 1, SCK K M b3. 2null x pSPI9 L x p l . x p ; V ! ! W . x p P p 2 l b , T T , 33 1l ? b ! ! ? . , 1 . V W b 13 V 7 , 3 b. s a T b3. 2. 1null 读操作RF
9、 5 Y V mosi l 1 3 , U 7 i , A4: A0 = 7 i b U U Q T T , 7 i Y V miso , ! ! V 16 | b3. 2. 2null 写操作RF 5 Y V mosi l 1 3 , U 7 i , A4: A0 = 7 i b U U Q T T ,| Y V mosi l 16 D15: D0 7 i bm 2 T g H :m 2null SPI T g H 4null RTL! 9 _ 4. 1null ? v ! 9 s s . 2 ,y N ! 9 1 ,h Y b! 9 , | / 3 n :1) ncs | ,i | T H e b ncs r , 3 ; ncsT | ,9 ncs sck W H 1 p2) sck d H bsck q
