MC9S12T64 Datasheet, PDF (434/608 Pages) Motorola, Inc – Specification

Freescale Semiconductor, Inc.
Serial Communications Interface (SCI)
NOTE: In 8-bit data format, only SCI data register low (SCIxDRL) needs to be
accessed.
NOTE: When transmitting in 9-bit data format and using 8-bit write instructions,
write first to SCI data register high (SCIxDRH), then SCIxDRL.
Functional Description
This section provides a complete functional description of the SCI block,
detailing the operation of the design from the end user perspective in a
number of subsections.
Figure 76 shows the structure of the SCI module. The SCI allows full
duplex, asynchronous, NRZ serial communication between the CPU
and remote devices, including other CPUs. The SCI transmitter and
receiver operate independently, although they use the same baud rate
generator. The CPU monitors the status of the SCI, writes the data to be
transmitted, and processes received data.
MC9S12T64Revision 1.1.1
Serial Communications Interface (SCI)
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