Field
Function
This field should only be changed when the receiver is disabled.
7-6
—
Reserved
5
TXCTSSRC
Transmit CTS Source
Configures the source of the CTS input.
0b - CTS input is the CTS_B pin.
1b - 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.
0b - CTS input is sampled at the start of each character.
1b - 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.
This bit should only be changed when the receiver is disabled.
NOTE: Do not set both RXRTSE and TXRTSE.
0b - The receiver has no effect on RTS.
1b - RTS is deasserted if the receiver data register is full or a start bit has been detected that would
cause the receiver data register to become full. RTS is asserted if the receiver data register is not
full and has not detected a start bit that would cause the receiver data register to become full.
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. This bit should only be changed
when the transmitter is disabled.
0b - Transmitter RTS is active low.
1b - Transmitter RTS is active high.
1
TXRTSE
Transmitter request-to-send enable
Controls RTS before and after a transmission. This bit should only be changed when the transmitter is
disabled.
0b - The transmitter has no effect on RTS.
1b - When a character is placed into an empty transmitter data buffer , RTS asserts one bit time
before the start bit is transmitted. RTS deasserts one bit time after all characters in the transmitter
data buffer and shift register are completely sent, including the last stop bit.
0
TXCTSE
Transmitter clear-to-send enable
TXCTSE controls the operation of the transmitter. TXCTSE can be set independently from the state of
TXRTSE and RXRTSE.
0b - CTS has no effect on the transmitter.
1b - Enables clear-to-send operation. The transmitter checks the state of CTS each time it is ready
to send a character. If CTS is asserted, the character is sent. If CTS is deasserted, the signal TXD
remains in the mark state and transmission is delayed until CTS is asserted. Changes in CTS as a
character is being sent do not affect its transmission.
47.3.1.12 LPUART FIFO Register (FIFO)
Register definition
MWCT101xS Series Reference Manual, Rev. 3, 07/2019
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NXP Semiconductors
Содержание MWCT101 S Series
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