mpc823rg Freescale Semiconductor, Inc, mpc823rg Datasheet - Page 453

• Manufacturer Part Number: mpc823rg
• Description: Mpc823 Powerquicc Integrated Communications Processor For Portable Systems
• Manufacturer: Freescale Semiconductor, Inc

SECTION 16
COMMUNICATION PROCESSOR MODULE
The MPC823 communication processor module (CPM) provides a flexible and integrated
approach to communication-intensive environments. To reduce system frequency and save
power, the communication processor module has its own independent RISC microcontroller
that is optimized and tuned to handle serial communications. The communication processor
module offloads the core in the following ways:
The communication processor module in the MPC823 and MPC821 are similar and are both
derived from the communication processor module in the MC68360 QUICC. However, there
are distinct differences, which are discussed in this section.
16.1 FEATURES
The following is a list of the communication processor module’s main features. For quick
reference purposes, the superscripted number following each item below is the page
number where the feature is described.
• By reducing the interrupt rate. The core is interrupted only upon frame reception or
• By implementing some of the Layer-2 multiply-and-accumulate processing, which
• By supporting multibuffer memory data structures that are convenient for software
• 32-Bit RISC Microcontroller
• Flexibility of Four General-Purpose 16-Bit Timers or Two 32-Bit Timers
• A Serial Interface with a Time-Slot Assigner
• Four Independent Baud Rate Generators
• Two Full-Duplex Serial Communication Controllers (SCC2 and SCC3)
• A Universal Serial Bus Controller
• Two Full-Duplex Serial Management Controllers (SMCs)
• Serial Peripheral Interface (SPI) Support for Master or Slave
• I
• General-Purpose Parallel Interface Ports with Open-Drain Capability
• Communication Processor Module Interrupt Controller with Flexible Priorities
transmission, instead of on a per-character basis.
provides more CPU bandwidth for higher layer processing.
handling.
2
C Bus Controller Support for Master or Slave
Freescale Semiconductor, Inc.
For More Information On This Product,
MPC823 REFERENCE MANUAL
4
Go to: www.freescale.com
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