MC9S12HY64 Datasheet, PDF (423/792 Pages) Freescale Semiconductor, Inc – S12 Microcontrollers

Serial Communication Interface (S12SCIV5)
12.1.4 Block Diagram
Figure 12-1 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 12-1. SCI Block Diagram
Data Out TXD
MC9S12HY/HA-Family Reference Manual, Rev. 1.04
Freescale Semiconductor
423