AT91RM9200(2003) Просмотр технического описания (PDF) - Atmel Corporation

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AT91RM9200
(Rev.:2003)

ARM920T™- based Microcontroller

Atmel Corporation 

Description

The AT91RM9200 is a complete system-on-chip built around the ARM920T ARM Thumb pro-

cessor. 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 incorpo-

rates controllers for synchronous DRAM (SDRAM), Burst Flash and Static memories and

features specific circuitry facilitating the interface for SmartMedia, CompactFlash and NAND

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 Data 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 inter-

vention. 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 point-

ers that simplify significantly buffer chaining.

The set of Parallel I/O (PIO) controllers multiplex the peripheral input/output lines with general-

purpose data I/Os for maximum flexibility in device configuration. An input change interrupt,

open drain capability and programmable pull-up resistor is included on each line.

The Power Management Controller (PMC) keeps system power consumption to a minimum by

selectively enabling/disabling the processor and various peripherals under software control. It

uses an enhanced clock generator to provide a selection of clock signals including a slow

clock (32 kHz) to optimize power consumption and performance at all times.

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 net-

working 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.

To complete the offer, the AT91RM9200 benefits from the integration of a wide range of debug

features including JTAG-ICE, a dedicated UART debug channel (DBGU) and an embedded

real time trace. This enables the development and debug of all applications, especially those

with real-time constraints.

2 AT91RM9200

1768B–ATARM–08/03

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