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Function explanation : [Function explanation]

Simulation : [Clock frequency] [SPI format] [SSI format] [Microwire format]

  • The SSI format is a four-wire interface consisting of a clock (SPxCLK), transmission data (SPxDO), reception data (SPxDI) and serial frame start signal (SPxFSS), which can simultaneously transmit and receive data.
  • You can set the data size from 4 bits to 16 bits.
  • During single transfer, the serial frame start signal outputs a high pulse before transmission and reception. Meanwhile, during successive transfer, it outputs a high pulse at the same time as the first bit output after the second word.

Setting

RegisterSetting
Data size select : SSPxCR0<DSS>
single/continuous
Data : SSPxDR<DATA> (Input in hexadecimal.)
In actual successive transfers, data are consecutively set in the transmission buffer. The simulation shows only the first bit as the "second word".

 

Communication waveforms

SPxFSS
SPxCLK
SPxDO
SPxDI
b15
b14
b13
b12
b11
b10
b09
b08
b07
b06
b05
b04
b03
b02
b01
b00
2nd word
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