NF=0, OR=0, RDRF=0, TC=0, FE=0, TDRE=0, IDLE=0, PF=0
UART Status Register 1
| PF | Parity Error Flag 0 (0): No parity error detected. 1 (1): Parity error. |
| FE | Framing Error Flag 0 (0): No framing error detected. 1 (1): Framing error. |
| NF | Noise Flag 0 (0): No noise detected. 1 (1): Noise detected in the received character in D. |
| OR | Receiver Overrun Flag 0 (0): No overrun has occurred since the last time the flag was cleared. 1 (1): Overrun has occurred or the overrun flag has not been cleared since the last overrun occured. |
| IDLE | Idle Line Flag 0 (0): Receiver input is either active now or has never become active since the IDLE flag was last cleared. 1 (1): Receiver input has become idle or the flag has not been cleared since it last asserted. |
| RDRF | Receive Data Register Full Flag 0 (0): Receive data buffer is empty. 1 (1): Receive data buffer is full. |
| TC | Transmit Complete Flag 0 (0): Transmitter active (sending data, a preamble, or a break). 1 (1): Transmitter idle (transmission activity complete). |
| TDRE | Transmit Data Register Empty Flag 0 (0): Transmit data buffer is full. 1 (1): Transmit data buffer is empty. |