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:Blog
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