MPC5200B Users Guide, Rev. 1
1-4 Freescale Semiconductor
Architecture
The MPC5200B supports a dual external bus architecture consisting of:
1. an SDRAM Bus
2. a multi-function LocalPlus Bus
The SDRAM Bus has a Memory Controller interface which supports standard SDRAM and Double Data Rate (DDR) SDRAM devices. The
Memory Controller has 13 Memory Address (MA) lines multiplexed with 32 Data Bus lines. Standard SDRAM control signals are included.
The high-speed Memory Controller SDRAM interface connects directly to the microprocessor, allowing optimized instruction and data
bursting. The dedicated memory interface, coupled with on-chip 16Kilobyte instruction and 16Kilobyte data caches, enables high
performance for computer intensive applications, such as Java and soft modems. Still, plenty of processing power remains for peripheral
management and system control tasks.
The LocalPlus Bus provides for connection of external peripheral devices, disk storage, and slower speed memory. The LocalPlus Bus also
supports an external Boot ROM/FLASH /SRAM interface.
The MPC5200B integrates a high performance e300 core with an I/O subsystem containing an intelligent Direct Memory Access ( DMA)
unit, BestComm. The BestComm unit is capable of:
responding to peripheral interrupts, independent of the e300 core.
providing low level peripheral management, protocol processing, and peripheral data movement functions.
The MPC5200B has an optimized peripheral mix to support today’s embedded automotive and telematics requirements.
Figure 1-2 shows an MPC5200B-based system.