MPC5510 Microcontroller Family Reference Manual, Rev. 1
Freescale Semiconductor
24-1
Preliminary
Chapter 24
Enhanced Serial Communication Interface (eSCI)
24.1
Introduction
The eSCI allows asynchronous serial communications with peripheral devices and other CPUs. The eSCI
has special features that allow the eSCI to operate as a LIN bus master, complying with the LIN 2.0
specification.
24.1.1
Block Diagram
A simplified block diagram of the eSCI illustrates the functionality and interdependence of major blocks
(see
Figure 24-1. eSCI Block Diagram
IRQ
generation
Receive and wakeup 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
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
(Finite State
Machine)