MC9S12T64 Datasheet, PDF (422/608 Pages) Motorola, Inc – Specification

Freescale Semiconductor, Inc.
Serial Communications Interface (SCI)
SCI Data Register
RX Data In
Receive Shift Register
IDLE
IRQ
IRQ
Gener-
ation _RDRF/OR
Bus Clk
Receive & Wake Up Control
BAUD
÷16
Generator
Data Format Control
IRQ
O
R
I
N
G
Transmit Control
Transmit Shift Register
SCI Data Register
IRQ
Gene-
ration
TDRE
IRQ
TC
IRQ
TXData Out
Figure 74 SCI Block Diagram
External Pin Descriptions
RXD (PS0, PS2)
SCI receive pin. This pin serves as receive data input of SCI. When the
SCI operates in single wire mode (LOOPS=1 in SCRxCR1 register), this
channel is unused and corresponding MCU pins (PS0, PS2) can be
used as general purpose I/O.
TXD (PS1, PS3)
SCI transmit pin. This pin serves as transmit data output of SCI.
MC9S12T64Revision 1.1.1
Serial Communications Interface (SCI)
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