Digital Signal ControllersのトピックMC56F84789 :PROBLEMS WITH PWMA REGISTERS AND PWMB FAULT3 FUNCTION ?

MC56F84789 :PROBLEMS WITH PWMA REGISTERS AND PWMB FAULT3 FUNCTION ?

zhangzeliang — Fri, 21 Nov 2014 06:20:16 GMT

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 ?

Re: MC56F84789 :PROBLEMS WITH PWMA REGISTERS AND PWMB FAULT3 FUNCTION ?

xiangjun_rong — Fri, 21 Nov 2014 08:58:13 GMT

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.

XiangJun Rong

Re: MC56F84789 :PROBLEMS WITH PWMA REGISTERS AND PWMB FAULT3 FUNCTION ?

zhangzeliang — Sat, 22 Nov 2014 00:05:24 GMT

thanks very much