LPUARTx_STAT field descriptions (continued)Field Description0 No LIN break character has been detected.1 LIN break character has been detected.30RXEDGIFLPUART_RX Pin Active Edge Interrupt FlagRXEDGIF is set when an active edge, falling if RXINV = 0, rising if RXINV=1, on the LPUART_RX pinoccurs. RXEDGIF is cleared by writing a 1 to it.0 No active edge on the receive pin has occurred.1 An active edge on the receive pin has occurred.29MSBFMSB FirstSetting this bit reverses the order of the bits that are transmitted and received on the wire. This bit doesnot affect the polarity of the bits, the location of the parity bit or the location of the start or stop bits. This bitshould only be changed when the transmitter and receiver are both disabled.0 LSB (bit0) is the first bit that is transmitted following the start bit. Further, the first bit received after thestart bit is identified as bit0.1 MSB (bit9, bit8, bit7 or bit6) is the first bit that is transmitted following the start bit depending on thesetting of CTRL[M], CTRL[PE] and BAUD[M10]. Further, the first bit received after the start bit isidentified as bit9, bit8, bit7 or bit6 depending on the setting of CTRL[M] and CTRL[PE].28RXINVReceive Data InversionSetting this bit reverses the polarity of the received data input.NOTE: Setting RXINV inverts the LPUART_RX input for all cases: data bits, start and stop bits, break,and idle.0 Receive data not inverted.1 Receive data inverted.27RWUIDReceive Wake Up Idle DetectFor RWU on idle character, RWUID controls whether the idle character that wakes up the receiver sets theIDLE bit. For address match wakeup, RWUID controls if the IDLE bit is set when the address does notmatch. This bit should only be changed when the receiver is disabled.0 During receive standby state (RWU = 1), the IDLE bit does not get set upon detection of an idlecharacter. During address match wakeup, the IDLE bit does not get set when an address does notmatch.1 During receive standby state (RWU = 1), the IDLE bit gets set upon detection of an idle character.During address match wakeup, the IDLE bit does get set when an address does not match.26BRK13Break Character Generation LengthBRK13 selects a longer transmitted break character length. Detection of a framing error is not affected bythe state of this bit. This bit should only be changed when the transmitter is disabled.0 Break character is transmitted with length of 10 bit times (if M = 0, SBNS = 0) or 11 (if M = 1, SBNS =0 or M = 0, SBNS = 1) or 12 (if M = 1, SBNS = 1 or M10 = 1, SNBS = 0) or 13 (if M10 = 1, SNBS = 1).1 Break character is transmitted with length of 13 bit times (if M = 0, SBNS = 0) or 14 (if M = 1, SBNS =0 or M = 0, SBNS = 1) or 15 (if M = 1, SBNS = 1 or M10 = 1, SNBS = 0) or 16 (if M10 = 1, SNBS = 1).25LBKDELIN Break Detection EnableLBKDE selects a longer break character detection length. While LBKDE is set, receive data is not storedin the receive data buffer.Table continues on the next page...Chapter 37 Low Power Universal asynchronous receiver/transmitter (LPUART)KL27 Sub-Family Reference Manual , Rev. 5, 01/2016Freescale Semiconductor, Inc. 655
