參數(shù)資料
型號(hào)： AT91X40
廠商： Atmel Corp.
英文描述： AT91 ARM Thumb Microcontrollers
中文描述： AT91上的ARM微控制器拇指
文件頁數(shù)： 1/153頁
文件大?。?/td> 1837K
代理商： AT91X40
1
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)
On-chip SRAM and/or ROM
– 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
Available in a 100-lead TQFP Package
Description
The AT91X40 Series is a subset of the Atmel AT91 16/32-bit microcontroller family,
which is based on the ARM7TDMI processor core. This processor has a high-perfor-
mance 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 AT91X40 Series 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 signifi-
cantly improve the real-time performance of the device.
The devices are 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 Atmel AT91X40 Series is a fam-
ily of powerful microcontrollers that offer a flexible, cost-effective solution to many
compute-intensive embedded control applications.
Microcontroller
Primary SRAM Bank
Secondary SRAM Bank
ROM
AT91M40800
8K Bytes
–
–
AT91R40807
8K Bytes
128K Bytes
–
AT91M40807
8K Bytes
–
128K Bytes
AT91R40008
256K Bytes
–
–
AT91
ARM
Thumb
Microcontrollers
AT91M40800
AT91R40807
AT91M40807
AT91R40008
Rev. 1354D–ATARM–05/02
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