NXP Semiconductors MPC5644A, Reference Manual, Page: 1363 / 1735

Enhanced Serial Communication Interface (ESCI)
MPC5644A Microcontroller Reference Manual, Rev. 6
Freescale Semiconductor 1363
The maximum percent difference between the receiver baud rate and the transmitter baud rate is:
Eqn. 31-10
The maximum percent differences for the supported frames is given in Table 31-24
31.4.5 SCI mode
31.4.5.1 SCI mode configuration
The application must configure the following bits and fields in order to achieve correct SCI operation.
• enable SCI Mode
– LIN Control Register 1 (eSCI_LCR1) [LIN]:= 0
• select baud rate
– Baud Rate Register (eSCI_BRR) [SBR]
• select receiver input mode
– Control register 1 (eSCI_CR1) [LOOPS]
– Control register 1 (eSCI_CR1) [RSRC]
• select frame format
– Control register 1 (eSCI_CR1) [M]
– Control register 1 (eSCI_CR1) [PE]
– Control register 1 (eSCI_CR1) [WAKE]
– Control register 3 (eSCI_CR3) [M2]
• select parity type
– Control register 1 (eSCI_CR1) [PT]
31.4.5.2 Transmitter
The transmitter supports the transmission of all frame types defined in Table 31-18 , of all break characters
defined in Table 31-20 , and of all idle characters defined in Table 31-21 .
31.4.5.2.1 Transmitter states and transitions
The transmitter has four basic states which are shown and described in Table 31-25 . The state transitions
that can triggered by the application commands are shown in Table 31-26 . The state transitions that can
Table 31-24. Slower Receiver Maximum Tolerance
payload bits stop bits max baudrate difference rx
STOP
tx
START
8 1 4.37% 153 160
9 1 3.97% 169 176
9 2 3.57% 185 196
13 2 2.73% 249 256
baudrate

tx
START
rx
STOP
–
tx
START
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 
 
100
 