## Overview of MPC8379E-RDB Electronic Components The **MPC8379E-RDB** is a Reference Design Board (RDB) developed by Freescale (now NXP) to showcase the capabilities of the **PowerQUICC II Pro** processor family. It is specifically designed for networked storage applications, such as SOHO NAS (Network Attached Storage) and digital media servers. --- ### 1. Core Processor The heart of the board is the **MPC8379E** processor, which is based on the e300c4s core (built on Power Architecture technology). | Feature | Specification | | :--- | :--- | | **Core Frequency** | Up to 800 MHz | | **L1 Cache** | 32 KB Instruction + 32 KB Data | | **Security Engine** | Integrated SEC 3.0 (supports AES, DES, MD5, SHA, RSA) | | **SATA Controllers** | 4 x SATA II (3.0 Gbps) interfaces | --- ### 2. Memory Architecture The board includes various memory types for booting, operating system execution, and data buffering. * **DDR2 SDRAM:** Typically equipped with 256MB to 512MB of 64-bit wide DDR2-400/667 memory. * **NOR Flash:** Contains the bootloader (U-Boot). Usually 8MB to 16MB. * **NAND Flash:** Used for high-capacity storage of the Linux kernel and root file system. Usually 32MB to 64MB. * **EEPROM:** A small I2C-based memory for storing board-specific configuration data (MAC addresses, etc.). --- ### 3. Connectivity and I/O Interfaces The MPC8379E-RDB is densely packed with peripheral components to support its role as a storage controller. #### Networking * **Dual Gigabit Ethernet:** Two 10/100/1000 Mbps ports (typically using Vitesse or Marvell PHYs) connected via the TSEC (Triple Speed Ethernet Controller) interfaces. #### Storage Interfaces * **SATA II:** 4 physical SATA connectors for direct connection to Hard Disk Drives (HDDs) or Solid State Drives (SSDs). * **USB 2.0:** Integrated High-Speed USB controller with On-The-Go (OTG) support, often utilizing an external PHY. #### Expansion Slots * **PCI Express (PCIe):** Two Mini-PCIe slots for wireless cards or additional interface cards. * **PCI:** One standard 32-bit PCI 2.3 slot (33/66 MHz). --- ### 4. Support and Management Components * **Power Management:** Multiple DC-DC converters to step down 12V/5V inputs to core voltages (1.0V), I/O voltages (3.3V), and DDR2 voltages (1.8V). * **UART:** Dual RS-232 serial ports for console debugging and system monitoring. * **JTAG/COP:** Headers for hardware debugging using tools like CodeWarrior or BDI3000. * **RTC:** Integrated Real-Time Clock with battery backup. --- ### 5. Typical Block Diagram Logic ```mermaid graph TD CPU[MPC8379E Processor] --> DDR2[DDR2 Memory] CPU --> SATA[4x SATA II Ports] CPU --> GBE[2x Gigabit Ethernet PHY] CPU --> USB[USB 2.0 OTG] CPU --> PCI[PCI / Mini-PCIe Slots] CPU --> Flash[NOR/NAND Flash] ```