PA2 -> TX2 (3.3v GPS or PWM Input #3)
PA3 -> RX2 (3.3v GPS or PWM Input #4)
PA12 -> Buzzer
PA4 -> VBAT
Both pins can't be used as it is for both the usage, since for buzzer is needed a transistor for drive the buzzer, and for VBAT it is needed a voltage divider (two resistors) plus a stabilizer (capacitor)
(不翻译了，我也要实践了，才知道怎么回事)
PB4 -> LED0
PB3 -> LED1
Both need a led + a resistor for avoid to overload the ping ... 1k resistor should do the job (even 1 shared between the two led for save few cents)
如果是并行pwm输入，查考如下
Here are the pin to be connected for each PWM input channel (please refer to TimeCop Naze32 manual for know the channel order, I have no idea if he use TAER1234 or AETR1234 ... or else )
