Описание
The AT91RM9200 is a complete system-on-chip built around the ARM920T ARM Thumb processor. It incorporates a rich set of system and application peripherals and standard interfaces in order to provide a single-chip solution for a wide range of compute-intensive applications that require maximum functionality at minimum power consumption at lowest cost. The AT91RM9200 incorporates a high-speed on-chip SRAM workspace, and a low-latency External Bus Interface (EBI) for seamless connection to whatever configuration of off-chip memories and memory-mapped peripherals is required by the application. The EBI incorporates controllers for synchronous DRAM (SDRAM), Burst Flash and Static memories and features specific circuitry facilitating the interface for NAND Flash/SmartMedia and Compact Flash. The Advanced Interrupt Controller (AIC) enhances the interrupt handling performance of the ARM920T processor by providing multiple vectored, prioritized interrupt sources and reducing the time taken to transfer to an interrupt handler. The Peripheral DMA Controller (PDC) provides DMA channels for all the serial peripherals, enabling them to transfer data to or from on- and off-chip memories without processor intervention. This reduces the processor overhead when dealing with transfers of continuous data streams.The AT91RM9200 benefits from a new generation of PDC which includes dual pointers that simplify significantly buffer chaining. The AT91RM9200 integrates a wide range of standard interfaces including USB 2.0 Full Speed Host and Device and Ethernet 10/100 Base-T Media Access Controller (MAC), which provides connection to a extensive range of external peripheral devices and a widely used networking layer. In addition, it provides an extensive set of peripherals that operate in accordance with several industry standards, such as those used in audio, telecom, Flash Card, infrared and Smart Card applications.
- Incorporates the ARM920T™ ARM® Thumb® Processor
- 200 MIPS at 180 MHz, Memory Management Unit
- 16-KByte Data Cache, 16-KByte Instruction Cache, Write Buffer
- In-circuit Emulator including Debug Communication Channel
- Mid-level Implementation Embedded Trace Macrocell™ (256-ball BGA Package only)
- Low Power: On VDDCORE 24.4 mA in Normal Mode, 520 µA in Standby Mode
- Additional Embedded Memories
- 16K Bytes of SRAM and 128K Bytes of ROM
- External Bus Interface (EBI)
- Supports SDRAM, Static Memory, Burst Flash, Glueless Connection to CompactFlash® and NAND Flash/SmartMedia®
- System Peripherals for Enhanced Performance:
- Enhanced Clock Generator and Power Management Controller
- Two On-chip Oscillators with Two PLLs
- Very Slow Clock Operating Mode and Software Power Optimization Capabilities
- Four Programmable External Clock Signals
- System Timer Including Periodic Interrupt, Watchdog and Second Counter
- Real-time Clock with Alarm Interrupt
- Debug Unit, Two-wire UART and Support for Debug Communication Channel
- Advanced Interrupt Controller with 8-level Priority, Individually Maskable Vectored Interrupt Sources, Spurious Interrupt Protected
- Seven External Interrupt Sources and One Fast Interrupt Source
- Four 32-bit PIO Controllers with Up to 122 Programmable I/O Lines, Input Change Interrupt and Open-drain Capability on Each Line
- 20-channel Peripheral DMA Controller (PDC)
- Ethernet MAC 10/100 Base-T
- Media Independent Interface (MII) or Reduced Media Independent Interface (RMII)
- Integrated 28-byte FIFOs and Dedicated DMA Channels for Receive and Transmit
- USB 2.0 Full Speed (12 Mbits per second) Host Double Port
- Dual On-chip Transceivers (Single Port Only on 208-lead PQFP Package)
- Integrated FIFOs and Dedicated DMA Channels
- USB 2.0 Full Speed (12 Mbits per second) Device Port
- On-chip Transceiver, 2-Kbyte Configurable Integrated FIFOs
- Multimedia Card Interface (MCI)
- Automatic Protocol Control and Fast Automatic Data Transfers
- MMC and SD Memory Card-compliant, Supports Up to Two SD Memory Cards
