MC68LC302 Datasheet, PDF (68/169 Pages) Motorola, Inc – Low Power Integrated Multiprotocol Processor Reference Manual

SECTION 4
COMMUNICATIONS PROCESSOR (CP)
The CP includes the following modules:
• Main Controller (RISC Processor)
• Four Serial Direct Memory Access (SDMA) Channels
• A Command Set Register
• Serial Channels Physical Interface Including:
—Motorola Interchip Digital Link (IDL)
—General Circuit Interface (GCI), Also Known as IOM-2
—Pulse Code Modulation (PCM) Highway Interface
—Nonmultiplexed Serial Interface (NMSI) Implementing Standard Modem Signals
• Two Independent Full Duplex Serial Communication Controllers (SCCs) Supporting the
Following Protocols:
—High-Level/Synchronous Data Link Control (HDLC/SDLC)
—Universal Asynchronous Receiver Transmitter (UART)
—Autobaud Function to Detect Baud Rate of the Incoming Asynchronous Bit Stream
—Binary Synchronous Communication (BISYNC)
—Transparent Modes
• Serial Communication Port (SCP) for Synchronous Communication
• Two Serial Management Controllers (SMCs) to Support the IDL and GCI Management
Channels
4.1 MC68LC302 KEY DIFFERENCES FROM THE MC68302
• SCC3 Was Removed.
• The SCP Is Now Multiplexed with the PA8, PA9, and PA10 Pins.
• The DDCMP and V.110 Protocols Were Removed.
• The Autobaud Function Was Added for Detecting the Baud Rate of the Incoming Asyn-
chronous Bit Stream.
This section only presents a description of features and registers that have changed or been
added. Features that have not changed such as UART, HDLC, BIYSYNC transparent, the
SMCs, and the SCP will not be discussed. For more information on any function not dis-
cussed in this section, please refer to the MC68302 User’s Manual.
This section assumes that the user is familiar with the different protocols. For more informa-
tion on a specific protocol implementation, please refer to the MC68302 User’s Manual
MOTOROLA
MC68LC302 REFERENCE MANUAL
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