MC56F84789 :PROBLEMS WITH PWMA REGISTERS AND PWMB FAULT3 FUNCTION ?

[zhangzeliang]

Hello everyone ! I don't understand why the PWMA_FCTRL1 and PWMA_FCTRL20 REGISTERS has the same address though i don't configure them for the moment.And when i enable any of  PWMB channel's  IPBUS clock , there is a fault flag set in the  PWMB_FSTS0 register anyway. There isn't having any fault  in the fault input pin . Can anybody can give some help ?

[xiangjun_rong]

Hi,ZeLiang,

The fault pin is very sensitive to external noise, I suggest you use the Fault filter function, which can filter the noise on the Faultx pin. for detailed information, pls refer to section  29.2.45 Fault Filter Register (PWMB_FFILTn) in the reference manual of MC56F847xx. Secondly, I suggest you do not have the fault pin float, the fault pin should be driven by external source.

BR

XiangJun Rong

[zhangzeliang]

thanks very much