Maxim Integrated MAX32665 - Page 269

MAX32665-MAX32668 User Guide
Maxim Integrated Page 269 of 457
UART Interrupt Flags
UARTn_INT_FL
[0x0010]
Bits
Field
Access
Reset
Description
7
break
R/W1C
0
Received Break Interrupt Flag
When the UART receives a series of BREAK frames, this flag is set when the first BREAK
frame is received. Write 1 to clear this field.
0: Break condition not occurred
1: Break condition occurred.
Note: See Table 12-1: UART Interrupt Conditions for description.
6
tx_fifo_lvl
R/W1C
0
Transmit FIFO Threshold Interrupt Flag
Set when the number of entries in in the Transmit FIFO is less than or equal to the
Transmit FIFO level set in UARTn_CTRL1.tx_fifo_lvl.
Write 1 to clear.
0: The Transmit FIFO level is below the threshold set in UARTn_CTRL1.tx_fifo_lvl.
1: The Transmit FIFO level is equal to or greater than the UARTn_CTRL1.tx_fifo_lvl.
Note: See Table 12-1: UART Interrupt Conditions for description.
5
tx_fifo_ae
R/W1C
0
Transmit FIFO Almost Empty Interrupt Flag
This field is set when there is one byte remaining in the Transmit FIFO.
Write 1 to clear.
0: Transmit FIFO level is greater than 1.
1: Transmit FIFO is Almost Empty.
4
rx_fifo_lvl
R/W1C
0
Receive FIFO Threshold Interrupt Flag
Set when number of entries in the Receive FIFO is equal to or greater than the Receive
FIFO threshold level as set in the UARTn_CTRL1.rx_fifo_lvl field. Data must be read
from the Receive FIFO to reduce the level below the threshold to guarantee this
interrupt does not occur again after clearing the flag. Write 1 to clear this field.
0: The number of bytes in the Receive FIFO is below the threshold level.
1: The number of bytes in the Receive FIFO is equal to or greater than the threshold
level.
Note: See Table 12-1: UART Interrupt Conditions for description.
3
rx_ovr
R/W1C
0
Receive FIFO Overrun Interrupt Flag
This field is set if the receive FIFO is full and an additional byte is received resulting in a
FIFO overrun condition. If this field is set at least one byte of received data has been
lost. Write 1 to clear.
0: Receive FIFO overrun has not occurred.
1: Receive FIFO overrun occurred.
2
cts
R/W1C
0
CTS Interrupt Flag
Also called Modem Status Interrupt. Write 1 to clear.
0: No state change
1: CTS has changed state.
1
parity
R/W1C
0
Receive Parity Error Status Flag
Set if a parity error is detected. This flag applies to data received only. Write 1 to clear.
0: Parity error has not been detected.
1: Parity error detected.
0
frame
R/W1C
0
Frame Error Status Flag
Set if a frame error occurs while receiving data. Write 1 to clear.
0: Frame error not occurred.
1: Frame error occurred.