Features
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Incorporates the ARM7TDMI
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ARM
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Processor Core
– High-performance 32-bit RISC Architecture
– High-density 16-bit Instruction Set
– Leader in MIPS/Watt
– EmbeddedICE
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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 LQFP Package (Green)
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AT91 ARM
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Microcontrollers
AT91M40800
Summary
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1. 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 com-
bining the ARM7TDMI processor core with 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.
NOTE:
This is a summary document.
The complete document is available on
the Atmel website at www.atmel.com.
1348FS–ATARM–13-Apr-06
ATMEL [ ATMEL CORPORATION ]
