MC9S12E128CFUE Datasheet, PDF (247/606 Pages) Freescale Semiconductor, Inc – MC9S12E128 Data Sheet

Chapter 8 Serial Communication Interface (SCIV3)
external interrupt brings the CPU out of stop mode. Exiting stop mode by reset aborts any transmission or
reception in progress and resets the SCI.
8.1.4 Block Diagram
Figure 8-1 is a high level block diagram of the SCI module, showing the interaction of various function
blocks.
RXD Data In
Infrared
Decoder
SCI Data Register
Receive Shift Register
IDLE Interrupt Request
IRQ
Generation
Bus Clk
Receive & Wakeup Control
BAUD
Generator
÷16
Data Format Control
Transmit Control
RDRF/OR
Interrupt
Request
TDRE
Interrupt
Request
SCI
Interrupt
Request
Transmit Shift Register
SCI Data Register
IRQ
Generation
TC Interrupt Request
Infrared
Encoder
Data Out TXD
Figure 8-1. SCI Block Diagram
MC9S12E128 Data Sheet, Rev. 1.07
Freescale Semiconductor
247