MSP430FR2355: Doubt in MSP430FR2355

Hello Team,

Actually i'm trying to run UART at 1Mbps which has continuous data transfer from slave to master but client asked for RX FIFO should have been implemented in CPU because UART is at 1Mbps.

Is there a way that we can effectively use MSP430FR2355 without RX FIFO and also without losing data at high rate data transmission?

If not possible, please select a CPU which is having at least  3 ADC's and RX FIFO and Low Power Consumption.I have seen TMS320F280021 which is having high power consumption 20mA. But, i want power consumption in micro Amps. Any help would be very thankful.