
MC68HC05C9A
—
Rev. 4.0
General Release Specification
MOTOROLA
Serial Communications Interface (SCI)
69
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General Release Specification — MC68HC05C9A
Section 9. Serial Communications Interface (SCI)
9.1 Content
9.2
9.3
9.4
9.5
9.6
9.7
9.8
9.9
9.10
9.11
9.12
9.13
9.14
9.14.1
9.14.2
9.14.3
9.14.4
9.14.5
Introduction...............................................................................70
Features....................................................................................70
SCI Receiver Features .............................................................72
SCI Transmitter Features .........................................................72
Functional Description..............................................................72
Data Format..............................................................................74
Receiver Wakeup Operation.....................................................75
Idle Line Wakeup......................................................................76
Address Mark Wakeup .............................................................76
Receive Data In (RDI)...............................................................76
Start Bit Detection.....................................................................78
Transmit Data Out (TDO) .........................................................80
SCI I/O Registers......................................................................80
SCI Data Register (SCDR)..................................................80
SCI Control Register 1 (SCCR1).........................................80
SCI Control Register 2 (SCCR2).........................................82
SCI Status Register (SCSR) ...............................................84
Baud Rate Register (BAUD)................................................86