46.3.1.8.4 Fields
Field
Function
31
R8T9
Receive Bit 8 / Transmit Bit 9
R8 is the ninth data bit received when the LPUART is configured for 9-bit or 10-bit data formats. When
reading 9-bit or 10-bit data, read R8 before reading LPUART_DATA.
T9 is the tenth data bit received when the LPUART is configured for 10-bit data formats. When writing 10-
bit data, write T9 before writing LPUART_DATA. If T9 does not need to change from its previous value,
such as when it is used to generate address mark or parity, they it need not be written each time
LPUART_DATA is written.
30
R9T8
Receive Bit 9 / Transmit Bit 8
R9 is the tenth data bit received when the LPUART is configured for 10-bit data formats. When reading
10-bit data, read R9 before reading LPUART_DATA
T8 is the ninth data bit received when the LPUART is configured for 9-bit or 10-bit data formats. When
writing 9-bit or 10-bit data, write T8 before writing LPUART_DATA. If T8 does not need to change from its
previous value, such as when it is used to generate address mark or parity, they it need not be written
each time LPUART_DATA is written.
29
TXDIR
TXD Pin Direction in Single-Wire Mode
When the LPUART is configured for single-wire half-duplex operation (LOOPS = RSRC = 1), this bit
determines the direction of data at the TXD pin. When clearing TXDIR, the transmitter will finish receiving
the current character (if any) before the receiver starts receiving data from the TXD pin.
0 - TXD pin is an input in single-wire mode.
1 - TXD pin is an output in single-wire mode.
28
TXINV
Transmit Data Inversion
Setting this bit reverses the polarity of the transmitted data output.
NOTE: Setting TXINV inverts the TXD output for all cases: data bits, start and stop bits, break, and idle.
0 - Transmit data not inverted.
1 - Transmit data inverted.
27
ORIE
Overrun Interrupt Enable
This bit enables the overrun flag (OR) to generate hardware interrupt requests.
0 - OR interrupts disabled; use polling.
1 - Hardware interrupt requested when OR is set.
26
NEIE
Noise Error Interrupt Enable
This bit enables the noise flag (NF) to generate hardware interrupt requests.
0 - NF interrupts disabled; use polling.
1 - Hardware interrupt requested when NF is set.
25
FEIE
Framing Error Interrupt Enable
This bit enables the framing error flag (FE) to generate hardware interrupt requests.
0 - FE interrupts disabled; use polling.
1 - Hardware interrupt requested when FE is set.
24
PEIE
Parity Error Interrupt Enable
This bit enables the parity error flag (PF) to generate hardware interrupt requests.
0 - PF interrupts disabled; use polling).
1 - Hardware interrupt requested when PF is set.
23
TIE
Transmit Interrupt Enable
Enables STAT[TDRE] to generate interrupt requests.
0 - Hardware interrupts from TDRE disabled; use polling.
Table continues on the next page...
Chapter 46 Low Power Universal Asynchronous Receiver/Transmitter (LPUART)
Kinetis KE1xZ256 Sub-Family Reference Manual, Rev. 3, 07/2018
NXP Semiconductors
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