Freescale Semiconductor, Inc.
Serial Communications Interface (SCI)
10.3 Features
Features of the SCI module include:
• Standard mark/space non-return-to-zero format
• Full-duplex operation
• 32 programmable baud rates
• Programmable 8-bit or 9-bit character length
• Separately enabled transmitter and receiver
• Two receiver wakeup methods:
– Idle line wakeup
– Address mark wakeup
• Interrupt-driven operation capability with five interrupt flags:
– Transmitter data register empty
– Transmission complete
– Receiver data register full
– Receiver overrun
– Idle receiver input
• Receiver framing error detection
• 1/16 bit-time noise detection
10.4 SCI Data Format
The SCI uses the standard non-return-to-zero mark/space data format
illustrated in Figure 10-1.
Technical Data
122
MC68HC705C8A — Rev. 3
Serial Communications Interface (SCI)
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