你要看reference manual,看如下手册的11.8 I/O Pin Mapping [pg988]
http://www.ti.com/lit/pdf/swcu117
11.3 I/O Mapping and Configuration The MCU IOC can map a number of peripheral modules such as GPIO, SSI (SPI), UART, I2C, and I2S to any of the available I/Os. The…
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