如题
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http://www.ti.com.cn/cn/lit/ug/spnu517b/spnu517b.pdf
该手册861页有提到,内容如下:
In master mode, if the SPISCS pins are configured as functional pins, then the pins will be in output mode.
A write to the master’s SPIDAT1/SPIDAT0 register will automatically drive the SPISCS signals low. The
master will drive the SPISCS signals high again after completing the transfer of the bits of the data.