AT91R40008_14 Datasheet, PDF (1/20 Pages) ATMEL Corporation – High-performance 32-bit RISC Architecture

Features
• Incorporates the ARM7TDMI^® ARM^® Thumb^® Processor Core
– High-performance 32-bit RISC Architecture
– High-density 16-bit Instruction Set
– Leader in MIPS/Watt
– Little-endian
– EmbeddedICE^™ (In-circuit Emulation)
• 8-, 16- and 32-bit Read and Write Support
• 256K Bytes of 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 Eight Chip Selects
– Software Programmable 8/16-bit External Data Bus
• 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
• Advanced Power-saving Features
– CPU and Peripheral Can be Deactivated Individually
• Fully Static Operation
– 0 Hz to 75 MHz Internal Frequency Range at V_DDCORE = 1.8V, 85°C
• 2.7V to 3.6V I/O Operating Range
• 1.65V to 1.95V Core Operating Range
• Available in 100-lead TQFP Package
• -40° C to +85° C Temperature Range
AT91
ARM^® Thumb^®
Microcontrollers
AT91R40008
Electrical
Characteristics
1. Description
The AT91R40008 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. Furthermore, it features 256K bytes of on-chip
SRAM and a large number of internally banked registers, resulting in very fast excep-
tion handling, and making the device ideal for real-time control applications.
The AT91R40008 microcontroller features a direct connection to off-chip memory,
including Flash, through the fully-programmable External Bus Interface (EBI). An
8-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 a large, on-chip, high-speed SRAM and a
wide range of peripheral functions on a monolithic chip, the AT91R40008 is a powerful
microcontroller that offers a flexible and high-performance solution to many compute-
intensive embedded control applications.
1795E–ATARM–12-Dec-05