TDRE=0, TC=0, RDRF=0, OR=0, IDLE=0, FE=0, PF=0, NF=0
UART Status Register 1
| PF | Parity Error Flag 0 (0): No parity error. 1 (1): Parity error. |
| FE | Framing Error Flag 0 (0): No framing error detected. This does not guarantee the framing is correct. 1 (1): Framing error. |
| NF | Noise Flag 0 (0): No noise detected. 1 (1): Noise detected in the received character in UART_D. |
| OR | Receiver Overrun Flag 0 (0): No overrun. 1 (1): Receive overrun (new UART data lost). |
| IDLE | Idle Line Flag 0 (0): No idle line detected. 1 (1): Idle line was detected. |
| RDRF | Receive Data Register Full Flag 0 (0): Receive data register empty. 1 (1): Receive data register full. |
| TC | Transmission 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 register (buffer) full. 1 (1): Transmit data register (buffer) empty. |