AT91M40400 Datasheet, PDF (1/7 Pages) ATMEL Corporation – 16/32-Bit Microcontroller

Features
• Incorporates the ARM7TDMI ^™ ARM Thumb processor
– High-performance 32-bit RISC architecture
– High-density 16-bit instruction set
– Leader in MIPS/Watt
– Embedded ICE In Circuit Emulation
• 4K bytes internal RAM
• Fully programmable External Bus Interface (EBI)
– Maximum external address space of 64M bytes
– Up to eight chip selects
– Software programmable 8/16-bit external databus
• Eight-level priority, individually maskable, vectored interrupt controller
– Four External interrupts, including a high priority low latency interrupt request
• 32 Programmable I/O lines
• Three-channel 16-bit timer/counter
– Three external clock inputs
– Two multi-purpose I/O pins per channel
• Two USARTs
– Two dedicated Peripheral Data Controller (PDC) channels per USART
• Programmable watchdog timer
• Low-power idle and power-down modes
• Fully static operation: 0 Hz to 33 MHz
• 2.7V to 3.6V operating range
• Available in a 100-lead TQFP package
Description
The AT91M40400 is a member of the Atmel AT91 16/32-bit Microcontroller family
which is based on the ARM7TDMI embedded processor. 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 registers
result in very fast exception handling, making the device ideal for real-time control
applications. The AT91 ARM-based MCU family also features Atmel’s high-density,
nonvolatile memory technology. The on-chip Flash program memory is in-system pro-
grammable.
The AT91M40400 has a direct connection to off-chip memory, including Flash,
through the External Bus Interface.
The device is manufactured using Atmel’s high-density CMOS technology. By com-
bining the ARM7TDMI microcontroller core with an on-chip RAM and a wide range of
peripheral functions on a monolithic chip, the Atmel AT91M40400 is a powerful micro-
controller that provides a flexible, cost-effective solution to many compute-intensive
embedded control applications.
16/32-Bit
Microcontroller
AT91M40400
Summary
Full datasheet (lit# 0768B)
also available by e-mailing
[e-mail]
Rev. 0768BS–08/98
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