第一代Sandstorm家族，与JTAG复用的GPIO可以直接配置。但是不够安全，意外的配置有可能导致JTAG连接失效。



对于第二代Fury和第三代DustDevil家族，由于GPIOLOCK等寄存器的保护，相关Pin默认为JTAG功能而不允许直接配置为GPIO功能。如果要想配置为GPIO功能，则必须首先执行解锁操作。



详见GPIO文档和例程。

-Sandstorm first-generation family, with the GPIO multiplexing JTAG can be directly configured. But it is not enough security, the configuration of the accident may have led to JTAG connection failure. Fury for the second generation and third generation DustDevil family, because of the protection register GPIOLOCK etc., relevant Pin function defaults to JTAG configuration does not allow for direct GPIO function. If it is configured as GPIO function, you must first unlock operation implementation. GPIO detailed documentation and routines.