AT91M40800(2002) 데이터 시트보기 (PDF) - Atmel Corporation

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AT91M40800
(Rev.:2002)

AT91 ARM® Thumb® Microcontrollers

Atmel Corporation 

Features

• Incorporates the ARM7TDMI™ ARM Thumb Processor Core

– High-performance 32-bit RISC Architecture

– High-density 16-bit Instruction Set

– Leader in MIPS/Watt

– Embedded ICE (In-circuit Emulation)

• 8K Bytes On-chip SRAM

– 32-bit Data Bus

– Single-clock Cycle Access

• Fully-programmable External Bus Interface (EBI)

– Maximum External Address Space of 64M Bytes

– Up to 8 Chip Selects

– Software Programmable 8/16-bit External Databus

• 8-level Priority, Individually Maskable, Vectored Interrupt Controller

– 4 External Interrupts, Including a High-priority Low-latency Interrupt Request

• 32 Programmable I/O Lines

• 3-channel 16-bit Timer/Counter

– 3 External Clock Inputs

– 2 Multi-purpose I/O Pins per Channel

• 2 USARTs

– 2 Dedicated Peripheral Data Controller (PDC) Channels per USART

• Programmable Watchdog Timer

• Advanced Power-saving Features

– CPU and Peripheral Can Be Deactivated Individually

• Fully Static Operation:

– 0 Hz to 40 MHz Internal Frequency Range at 3.0V, 85°C

• 1.8V to 3.6V Operating Range

• -40°C to +85°C Temperature Range

• Available in a 100-lead TQFP Package

AT91

ARM® Thumb®

Microcontrollers

AT91M40800

Summary

Description

The AT91M40800 microcontroller is a member of the Atmel AT91 16/32-bit microcon-

troller family, which is based on the ARM7TDMI processor core. This processor has a

high-performance 32-bit RISC architecture with a high-density 16-bit instruction set

and very low power consumption. In addition, a large number of internally banked reg-

isters result in very fast exception handling, making the device ideal for real-time

control applications.

The AT91M40800 microcontroller features a direct connection to off-chip memory,

including Flash, through the fully-programmable External Bus Interface (EBI). An

eight-level priority vectored interrupt controller, in conjunction with the Peripheral Data

Controller, significantly improves the real-time performance of the device.

The device is manufactured using Atmel’s high-density CMOS technology. By combin-

ing the ARM7TDMI processor core with an on-chip high-speed memory and a wide

range of peripheral functions on a monolithic chip, the AT91M40800 is a powerful

microcontroller that offers a flexible, cost-effective solution to many compute-intensive

embedded control applications.

Rev. 1348DS–ATARM–02/02

Note: This is a summary document. A complete document is 1

available on our web site at www.atmel.com.

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