MPC5553/MPC5554 Microcontroller Reference Manual, Rev. 5
Freescale Semiconductor 21-1
Chapter 21
Enhanced Serial Communication
Interface (eSCI)
21.1 Introduction
This section gives an overview of the MPC5553/MPC5554’s eSCI module, and presents a block diagram,
its features and its modes of operation.
21.1.1 Block Diagram
Figure 21-1. eSCI Block Diagram
IRQ
Generation
Receive & Wake-up Control
Receive Shift Register
eSCI Data Register
LIN Receive Register
LIN Transmit Register
DMA
Interface
TX DMA
RX DMA
RDRF/
OR IRQ
ORING IRQ to CPU
Data Format Control÷16
BAUD
Generator
Transmit Control
Transmit Shift Register
eSCI Data Register
IDLE
IRQ
IRQ
Generation
TC IRQ
TDRE
IRQ
TX Data Out
LIN FSM
1
LIN Error Detection
RXRDY
TXRDY
LWAKE
FRC
PBERR
BERR
CERR
CKERR
STO
OVFL
LIN Error Flags
LIN Status Flags
LIN Hardware
Peripheral
Bus Clock
RX Data In
1
Finite State
1
Machine
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