S912XHZ512F1VAG Datasheet, PDF (563/978 Pages) Freescale Semiconductor, Inc – Covers MC9S12XHZ384, MC9S12XHZ256

Chapter 15 Serial Communication Interface (S12SCIV5)
15.1.4 Block Diagram
Figure 15-1 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 15-1. SCI Block Diagram
Data Out TXD
MC9S12XHZ512 Data Sheet, Rev. 1.06
Freescale Semiconductor
563