MPC5553/MPC5554 Microcontroller Reference Manual, Rev. 5
21-6 Freescale Semiconductor
NOTES
After reset, the baud rate generator is disabled until the TE bit or the RE bit
is set for the first time.
23 PT Parity type. Determines whether the eSCI generates and checks for even parity or odd
parity. With even parity, an even number of 1s clears the parity bit and an odd number of
1s sets the parity bit. With odd parity, an odd number of 1s clears the parity bit and an even
number of 1s sets the parity bit.
0 Even parity
1 Odd parity
24 TIE Transmitter interrupt enable. Enables the transmit data register empty flag
ESCIx_SR[TDRE] to generate interrupt requests. The interrupt is suppressed in TX DMA
mode.
0 TDRE interrupt requests disabled
1 TDRE interrupt requests enabled
25 TCIE Transmission complete interrupt enable. Enables the transmission complete flag
ESCIx_SR[TC] to generate interrupt requests. The interrupt is suppressed in TX DMA
mode.
0 TC interrupt requests disabled
1 TC interrupt requests enabled
26 RIE Receiver full interrupt enable. Enables the receive data register full flag ESCIx_SR[RDRF]
and the overrun flag ESCIx_SR[OR] to generate interrupt requests. The interrupt is
suppressed in RX DMA mode.
0 RDRF and OR interrupt requests disabled
1 RDRF and OR interrupt requests enabled
27 ILIE Idle line interrupt enable. Enables the idle line flag ESCIx_SR[IDLE] to generate interrupt
requests.
0 IDLE interrupt requests disabled
1 IDLE interrupt requests enabled
28 TE Transmitter enable. Enables the eSCI transmitter and configures the TXD pin as being
controlled by the eSCI. The TE bit can be used to queue an idle preamble.
0 Transmitter disabled
1 Transmitter enabled
29 RE Receiver enable. Enables the eSCI receiver.
0 Receiver disabled
1 Receiver enabled
30 RWU Receiver wake-up. Standby state.
0 Normal operation.
1 RWU enables the wake-up function and inhibits further receiver interrupt requests.
Normally, hardware wakes the receiver by automatically clearing RWU.
31 SBK Send break. Toggling SBK sends one break character (see the description of
ESCIx_CR2[BRK13] for break character length). Toggling implies clearing the SBK bit
before the break character has finished transmitting. As long as SBK is set, the transmitter
continues to send complete break characters.
0 No break characters
1 Transmit break characters
Table 21-3. ESCIx_CR1 Field Descriptions
Bits Name Description
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