Datasheet

Chapter 11 Serial Communications Interface (S08SCIV2)
MC9S08AW60 Data Sheet, Rev 2
Freescale Semiconductor 183
11.1.1 Features
Features of SCI module include:
• Full-duplex, standard non-return-to-zero (NRZ) format
• Double-buffered transmitter and receiver with separate enables
• Programmable baud rates (13-bit modulo divider)
• Interrupt-driven or polled operation:
— Transmit data register empty and transmission complete
— Receive data register full
— Receive overrun, parity error, framing error, and noise error
— Idle receiver detect
• Hardware parity generation and checking
• Programmable 8-bit or 9-bit character length
• Receiver wakeup by idle-line or address-mark
• Optional 13-bit break character
• Selectable transmitter output polarity
11.1.2 Modes of Operation
See Section 11.3, “Functional Description,” for a detailed description of SCI operation in the different
modes.
• 8- and 9-bit data modes
• Stop modes — SCI is halted during all stop modes
• Loop mode
• Single-wire mode
11.1.3 Block Diagram
Figure 11-2 shows the transmitter portion of the SCI.