MC68HC705C9A_1 Datasheet, PDF (79/157 Pages) Freescale Semiconductor, Inc – General Release Specification

Freescale Semiconductor, Inc.
General Release Specification — MC68HC705C9A
Section 9. Serial Communications Interface (SCI)
9.1 Content
9.2 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .80
9.3 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .80
9.4 SCI Receiver Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .82
9.5 SCI Transmitter Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . .82
9.6 Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .82
9.7 Data Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .84
9.8 Receiver Wakeup Operation. . . . . . . . . . . . . . . . . . . . . . . . . . .85
9.9 Idle Line Wakeup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .86
9.10 Address Mark Wakeup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .86
9.11 Receive Data In (RDI). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .86
9.12 Start Bit Detection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .88
9.13 Transmit Data Out (TDO) . . . . . . . . . . . . . . . . . . . . . . . . . . . . .90
9.14 SCI I/O Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .90
9.14.1 SCI Data Register (SCDR) . . . . . . . . . . . . . . . . . . . . . . . . .90
9.14.2 SCI Control Register 1 (SCCR1). . . . . . . . . . . . . . . . . . . . .90
9.14.3 SCI Control Register 2 (SCCR2). . . . . . . . . . . . . . . . . . . . .92
9.14.4 SCI Status Register (SCSR) . . . . . . . . . . . . . . . . . . . . . . . .94
9.14.5 Baud Rate Register (BAUD) . . . . . . . . . . . . . . . . . . . . . . . .96
MC68HC705C9A — Rev. 2.0
Serial Communications Interface (SCI)
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