序列周邊介面
维基百科,自由的百科全书
串行外设接口(Serial Peripheral Interface Bus,SPI),類似I²C,是一種4線同步序列資料協定,適用於可攜式裝置平台系統,但使用率較I²C少。串行外设接口一般是4線,有時亦可為3線,有別於I²C的2線,以及1-Wire。
接口 [编辑]
SPI匯流排定義四組 logic signals.
- SCLK — Serial Clock (自master輸出)
- MOSI/SIMO — Master Output, Slave Input(自master輸出)
- MISO/SOMI — Master Input, Slave Output(自slave輸出)
- SS — Slave Select (active low; 自master輸出)
另一種稱呼亦廣泛被使用:
- SCK — Serial Clock (自master輸出)
- SDI, DI, SI — Serial Data In
- SDO, DO, SO — Serial Data Out
- nCS, CS, nSS, STE — Chip Select, Slave Transmit Enable (active low; 自master輸出)
外部連結 [编辑]
- Introduction to Serial Peripheral Interface article on embedded.com
- Serial buses information page
- SPI Introduction with helpful diagrams
- Serial Flash Lots of good information on SPI part manufacturers and models.
- SPI - PICmicro Serial Peripheral Interface Microchip (company) tutorial on SPI.
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