CC32XX中有关GPIO_PAD_CONFIG_0 to GPIO_PAD_CONFIG_32 Register中bit11和bit10的定义如图所示,不太看懂这两位的具体作用是什么,字面意思像是定义对应GPIO口输入输出的,但是GPIODIR Register已经定义了对应GPIO口的输入输出了,这样是不是重复了,有点看不懂,想请教一下TI的老师们。,
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CC32XX中有关GPIO_PAD_CONFIG_0 to GPIO_PAD_CONFIG_32 Register中bit11和bit10的定义如图所示,不太看懂这两位的具体作用是什么,字面意思像是定义对应GPIO口输入输出的,但是GPIODIR Register已经定义了对应GPIO口的输入输出了,这样是不是重复了,有点看不懂,想请教一下TI的老师们。,
主要是控制output buffer的,看如下描述:
The CC32xx device features flexible wide-voltage I/Os. Supported features follow:
• Programmable drive strength from 2 mA to 14 mA (nominal condition) in 2-mA steps.
• Open-drain mode
• Output buffer isolation
• Automatic output isolation during reset and hibernate
• Configurable pullup and pulldown (10-µA nominal)
• Software-configurable pad state retention during LPDS
结构图你可以看下TRM文档的Figure 16-3. I/O Pad Data and Control Path Architecture in CC3200