1. 先看模塊引腳，利爾達NB86-G模塊
2. VDD_IO_R1, VDD_IO_R2, VDD_IO_L1 and VDD_IO_L2 control the IO voltages on PIOs 0-9, 10-21, 22-33 and 34-39 respectively. Each supply rail may have a different voltage to interface with external systems or the RF front-end components
不同的GPIO由不同的電壓域控制，電壓域的引腳如下
