TMS320F28335 SCIC SCIFIFOFE bit value is not clear?

Mr/Mrs,

I use 28335 with FIFO mode of 3 SCI A, B, C controller.

In the serial SCIC, the SCIFIFOFE bit was set. But I can not clear it.

I tried to SW_RESET, but the bit was not cleared. 

Any method is it?

CheolHyeon Cho,