PXR40RM Datasheet, PDF (981/1434 Pages) Freescale Semiconductor, Inc – PXR40 Microcontroller

Enhanced Serial Communication Interface (eSCI)
3. clear and subsequently set the TE bit in Control Register 1 (eSCI_CR1)
— this set the internal iPRE bit which requests the preamble transmission
4. write to SCI Data Register (ESCI_DR)
— this sets the internal iCMT bit which requests the data transmission
The priority scheme of the transmitter which is described in Table 26-28 ensures, that the preamble is
transmitted before the data frame.
Freescale Semiconductor
PXR40 Microcontroller Reference Manual, Rev. 1
26-53