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UNIVERSAL ASYNCHRONOUS RECEIVER/TRANSMITTER MODULE
11.1 Overview
The universal asynchronous receiver/transmitter (UART) module provides asynchro-
nous serial communication with external devices such as modems and other comput-
ers. The UART module consists of two independent and almost identical channels.
The description of a single channel in this section applies to both UART0 and UART1,
with the exception of the CTS and RTS pin functions. These are available only for
UART0.
Some of the key features of the UART channels are:
• Full-duplex operation
• Direct support of Infrared Data Association mechanism
• Robust receiver data sampling with noise filtering
• 16-entry FIFOs for transmit and receive
• 7- or 8-bit operation with optional even or odd parity and one or two stop bits
• Generation and detection of break
• 16x bit clock generator for bit rates of 300 bps to 115.2 Kbps
• Three maskable interrupts
• RTS interrupt with wake up from stop capability
• Low-power modes
The UART performs all normal operations associated with "start-stop" asynchronous
communication. Serial data is transmitted and received at standard bit rates using the
internal 16x bit clock generator.
MMC2001
UNIVERSAL ASYNCHRONOUS RECEIVER/TRANSMITTER MODULE
REFERENCE MANUAL
All manuals and user guides at all-guides.com
Freescale Semiconductor, Inc.
SECTION 11
For More Information On This Product,
Go to: www.freescale.com
MOTOROLA
11-1
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