NXP Semiconductors KE1xF Series, Reference Manual, Page: 1312 / 1483

48.3.1.11.3 Diagram
Bits 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
R 0
IREN TNP
W
Reset
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Bits
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
R
RTSWATER
0
TXCT
SSRC
TXCT
SC
RXRT
SE
TXRT
SPOL TXRT
SE
TXCT
SE
W
Reset
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
48.3.1.11.4 Fields
Field Function
31-19
—
Reserved
18
IREN
Infrared enable
Enables/disables the infrared modulation/demodulation.
0 - IR disabled.
1 - IR enabled.
17-16
TNP
Transmitter narrow pulse
Configures whether the LPUART transmits a 1/OSR, 2/OSR, 3/OSR or 4/OSR narrow pulse when IR is
enabled.
The IR pulse width should be configured to less than half of the oversampling ratio. Common pulse
widths are 3/16, 1/16, 1/32 or 1/4 of the bit length. These can be configured by selecting the appropriate
oversample ratio and pulse width.
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 with receiver controlling RTS, it negates
when the the start bit is detetected for the character that will cause the FIFO to become full, and it asserts
when the FIFO is not full and the character being received would not cause the FIFO to become full.
7-6
—
Reserved
5
TXCTSSRC
Transmit CTS Source
Configures the source of the CTS input.
0 - CTS input is the CTS_B pin.
1 - CTS input is the inverted Receiver Match result.
4 Transmit CTS Configuration
Table continues on the next page...
Register definition
Kinetis KE1xF Sub-Family Reference Manual, Rev. 4, 06/2019
1312 NXP Semiconductors