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TMS320C6652: GPIO 寄存器

Part Number: TMS320C6652

TMS320C6652有32个GPIO,但在对应的KeyStone Architecture General Purpose Input/Output (GPIO) User Guide中说明寄存器只有低16位可以读写,高16位是Reserved,这样的话只有前16个GPIO可以设置,另外16个无法设置使用,请问是user guide错误?