MC9S12KG128 Datasheet, PDF (325/600 Pages) Freescale Semiconductor, Inc – Microcontrollers

Chapter 10
Serial Communications Interface (SCIV1)
10.1 Introduction
This block guide provide an overview of serial communication interface (SCI) module. The SCI allows
asynchronous serial communications with peripheral devices and other CPUs.
10.1.1 Glossary
IRQ — Interrupt Request
LSB — Least Significant Bit
MSB — Most Significant Bit
NRZ — Non-Return-to-Zero
RZI — Return-to-Zero-Inverted
RXD — Receive Pin
SCI — Serial Communication Interface
TXD — Transmit Pin
10.1.2 Features
The SCI includes these distinctive features:
• Full-duplex operation
• Standard mark/space non-return-to-zero (NRZ) format
• 13-bit baud rate selection
• Programmable 8-bit or 9-bit data format
• Separately enabled transmitter and receiver
• Programmable transmitter output parity
• Two receiver wake up methods:
— Idle line wake-up
— Address mark wake-up
• Interrupt-driven operation with eight flags:
— Transmitter empty
— Transmission complete
MC9S12KG128 Data Sheet, Rev. 1.15
Freescale Semiconductor
325