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Main difference between hardware SPI and software SPI

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  • Time of issue:2022-04-20 09:40
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(Summary description)

Main difference between hardware SPI and software SPI

(Summary description)

  • Categories:Sharing
  • Author:
  • Origin:
  • Time of issue:2022-04-20 09:40
  • Views:
Information

 

1. Main difference between hardware SPI and software SPI

1) Sequence:No difference


2) SPI speed: Hardware SPI is more efficient. When writing a program, you only need to write the data to be sent to the register, and the hardware will send it automatically. The software SPI requires additional steps such as SCLK to output high and low level, data serial output and so on.

 

3) Hardware requirement:Hardware SPI must be supported by the processor before it can be used. Software SPI does not need specific requirements. A general IO port is OK.

 

 

 

2. Comparison of corresponding signal lines

Name Clock Signal Output Data Input Data Chip Selection
Hardware SPI SCK MOSI MISO SS
Software SPI IO Analog Output IO  Analog Output IO  Analog Input IO  Analog Output

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