I used the demo lin stack that downloaded from the NXP website and I can implement the lin communication by the default pin PB0/PB1 and PA2/PA3 on the TRK demo board which is 80pin footprint, but after I transplant the project to the target board (64pin footprint) which used the PA2/PA3 , I can just received the lin signal and can't send the signal out, I don't know why. if the 64pin footprint chip can't use the PA2 and PA3?