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Serial Peripheral Interface - SPI
The Serial Peripheral Interface (SPI) allows high-speed synchronous data transfer between the AT90S2333/4433 and
peripheral devices or between several AVR devices. The AT90S2333/4433 SPI features include the following:
Full-Duplex, 3-Wire Synchronous Data Transfer
Master or Slave Operation
LSB First or MSB First Data Transfer
Four Programmable Bit Rates
End of Transmission Interrupt Flag
Write Collision Flag Protection
Wake-up from Idle Mode
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