mc9s12e256 Freescale Semiconductor, Inc, mc9s12e256 Datasheet - Page 243

• Manufacturer Part Number: mc9s12e256
• Description: Hcs12 Microcontrollers 16-bit Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

Chapter 8
Serial Communication Interface (SCIV4)
8.1
This block description chapter provides an overview of serial communication interface (SCI) module.
The SCI allows full duplex, asynchronous, serial communication between the CPU and remote devices,
including other CPUs. The SCI transmitter and receiver operate independently, although they use the same
baud rate generator. The CPU monitors the status of the SCI, writes the data to be transmitted, and
processes received data.
8.1.1
IR: infrared
IrDA: Infrared Design Association
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
8.1.2
The SCI includes these distinctive features:
Freescale Semiconductor
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Full-duplex or single-wire operation
Standard mark/space non-return-to-zero (NRZ) format
Selectable IrDA 1.4 return-to-zero-inverted (RZI) format with programmable pulse widths
13-bit baud rate selection
Programmable 8-bit or 9-bit data format
Separately enabled transmitter and receiver
Programmable polarity for transmitter and receiver
Introduction
Glossary
Features
MC9S12E256 Data Sheet, Rev. 1.08
243