Receiver FIFO read
DATA | Data read from the receiver FIFO. Reading a data frame will remove the data frame from the FIFO; i.e. behavior is similar to that of a POP operation. Note that when CTRL.BYTE_MODE is ‘1’, only DATA[7:0] are used. A read from an empty RX FIFO sets INTR_RX.UNDERFLOW to ‘1’. When this register is read through the debugger, the data frame will not be removed from the FIFO. Similar in operation to RX_FIFO_RD_SILENT |