CC2541功耗，管教配置问题

CC2541悬空管教如何配置才能降低功耗。另外，在 管教配置上，大神们有没有管教配置的经验，就是接有外设的管教要注意该如何配置，才能最大限度的降低功耗。   

参考用户手册7.1节：

Unused I/O Pins Unused I/O pins should have a defined level and not be left floating. One way to do this is to leave the pin unconnected and configure the pin as a general-purpose I/O input with pullup resistor. This is also the state of all pins during and after reset (except P1.0 and P1.1, which do not have pullup or pulldown capability). Alternatively, the pin can be configured as a general-purpose I/O output. In either case, the pin should not be connected directly to VDD or GND, in order to avoid excessive power consumption.