Freescale Semiconductor, Inc.
Serial Communications Interface (SCI)
17.9 I/O Registers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .242
17.9.1 SCI Control Register 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . .242
17.9.2 SCI Control Register 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . .245
17.9.3 SCI Control Register 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . .248
17.9.4 SCI Status Register 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . .250
17.9.5 SCI Status Register 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . .253
17.9.6 SCI Data Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .254
17.9.7 SCI Baud Rate Register. . . . . . . . . . . . . . . . . . . . . . . . . . .255
17.2 Introduction
17.3 Features
The serial communications interface (SCI) allows asynchronous
communications with peripheral devices and other MCUs.
The SCI module’s features include:
• Full-duplex operation
• Standard mark/space non-return-to-zero (NRZ) format
• 32 programmable baud rates
• Programmable 8-bit or 9-bit character length
• Separately enabled transmitter and receiver
• Separate receiver and transmitter CPU interrupt requests
• Programmable transmitter output polarity
• Two receiver wakeup methods:
– Idle line wakeup
– Address mark wakeup
Technical Data
MC68HC908AS60 — Rev. 1.0
Serial Communications Interface (SCI)
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FREESCALE [ Freescale ]
