SPI (Serial Peripheral Interface Bus)

SPI (Serial Peripheral Interface Bus)SPI ??? . Master-Slave Master Slave . 70MHz I2C .

SCLK : Serial Clock, Master ClockMOSI : Master Output Slave Input. (Output from master)MISO : Master Input Slave Output. (Output from slave)SS : Slave Select. Master Slave Active Low .Single SPI

Master . Slave . Master SS Slave logic 0 Slave .(Active Low) Master SLCK MOSI , MISO .(Full Duplex) , SLCK . SPI 8 12, 16 . SS SS 0 Slave DataSheet . ()

() CPOL CPHA 4 .( .)

ModeCPOLCPHA000101210311Multi Slave

Typical SPI BUSDaisy-Chained SPI BUSTypical SPI Slave Slave Master SS .Daisy-Chained SPI Master Slave SS , Shift register .SPI Full duplex communication . (bit .) . .SPI Master . .( 4, Slave ) , .I2C ACK Master . http://mintnlatte.tistory.com/199 ( )

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