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LPUARTx_MODIR field descriptions
Field
Description
31–19
Reserved
This field is reserved.
This read-only field is reserved and always has the value 0.
18
IREN
Infrared enable
Enables/disables the infrared modulation/demodulation.
0
IR disabled.
1
IR enabled.
17–16
TNP
Transmitter narrow pulse
Enables whether the LPUART transmits a 1/OSR, 2/OSR, 3/OSR or 4/OSR narrow pulse.
00
1/OSR.
01
2/OSR.
10
3/OSR.
11
4/OSR.
15–8
RTSWATER
Receive RTS Configuration
Configures the point at which the RX RTS output negates based on the number of additional characters
that can be stored in the Receive FIFO. When configured to 0, RTS negates when the the start bit is
detetected for the character that will cause the FIFO to become full.
0
RTS asserts when the receiver FIFO is full or receiving a character that causes the FIFO to become
full.
1
RTS asserts when the receive FIFO is less than or equal to the RXWATER configuration and negates
when the receive FIFO is greater than the RXWATER configuration.
7–6
Reserved
This field is reserved.
This read-only field is reserved and always has the value 0.
5
TXCTSSRC
Transmit CTS Source
Configures the source of the CTS input.
0
CTS input is the LPUART_CTS pin.
1
CTS input is the inverted Receiver Match result.
4
TXCTSC
Transmit CTS Configuration
Configures if the CTS state is checked at the start of each character or only when the transmitter is idle.
0
CTS input is sampled at the start of each character.
1
CTS input is sampled when the transmitter is idle.
3
RXRTSE
Receiver request-to-send enable
Allows the RTS output to control the CTS input of the transmitting device to prevent receiver overrun.
NOTE: Do not set both RXRTSE and TXRTSE.
0
The receiver has no effect on RTS.
1
RTS assertion is configured by the RTSWATER field
2
TXRTSPOL
Transmitter request-to-send polarity
Controls the polarity of the transmitter RTS. TXRTSPOL does not affect the polarity of the receiver RTS.
RTS will remain negated in the active low state unless TXRTSE is set.
Table continues on the next page...
Register definition
K32 L2A Reference Manual, Rev. 2, 01/2020
830
NXP Semiconductors
Содержание K32 L2A Series
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