NXP Semiconductors MC9S08QL4, Reference Manual

Page: 183 / 240

Serial Communications Interface (S08SCIV4)
MC9S08QL8 MCU Series Reference Manual, Rev. 1
NXP Semiconductors 183
14.1.2 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
— Active edge on receive pin
— Break detect supporting LIN
• 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 generation / 11-bit break character detection
• Independently selectable polarity for transmitter output and receiver input
14.1.3 Modes of Operation
See Section 14.3, Functional Description for details concerning SCI operation in these modes:
• 8- and 9-bit data modes
• Stop mode operation
• Loop mode
• Single-wire mode
14.1.4 Block Diagram
Figure 14-2 shows the transmitter portion of the SCI.