NRF51822+PA

[andy2003hunan]

i want to add a PA for a nrf51822 chip inorder to extend the coverage. i choosed a PA IC named RFX2401C.i am wondering how to deal with the TX pin and RX pin of RFX2401C.could you enginners give me some advise on how connect a nrf51822 and a RFX2401C?and how to deal with the firmware. tks!

[FormerMember]

Hello,

You can connect the RX/TX switch to VDD_PA. This pin will go high (1.8V) when the TX is active and is low in standby and in RX mode. If you invert the signal, you have both RX enable and TX enable. Alternativly, use a IO to controll RX EN in other to switch off the PA and connect VDD_PA to TX EN.

Regards, Kristin