S912XEG384J3VA Datasheet, PDF (725/1324 Pages) Freescale Semiconductor, Inc – MC9S12XEP100 Reference Manual Covers MC9S12XE Family

Chapter 20 Serial Communication Interface (S12SCIV5)
20.1.4 Block Diagram
Figure 20-1 is a high level block diagram of the SCI module, showing the interaction of various function
blocks.
RXD Data In
Infrared
Decoder
Bus Clock _{Baud Rate}
Generator
1/16
SCI Data Register
Receive Shift Register
Receive & Wakeup
Control
Data Format Control
Transmit Control
IDLE
Receive
Interrupt ^RDRF/OR
Generation BRKD
RXEDG
BERR
Transmit
Interrupt ^TDRE
Generation TC
SCI
Interrupt
Request
Transmit Shift Register
Infrared
Encoder
SCI Data Register
Figure 20-1. SCI Block Diagram
Data Out TXD
MC9S12XE-Family Reference Manual Rev. 1.25
Freescale Semiconductor
725