TMS320F28P650DK: Idle interrupt of the f28p65dk UART peripheral

Part Number: TMS320F28P650DK

I’m using DMA + idle interrupt for data reception; idle interrupt triggers when reception is complete. I found an EOT flag in the driverlib, but the matching register bit is reserved in the datasheet. Is it possible to use this flag?? If not, what other methods can realize this function?  image.pngimage.png