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Features
• Incorporates the ARM7TDMI
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Processor Core
– High-performance 32-bit RISC Architecture
– High-density 16-bit Instruction Set
– Leader in MIPS/Watt
– Embedded ICE (In-circuit Emulation)
• 136K Bytes of On-chip SRAM
– 32-bit Data Bus, Single-clock Cycle Access
• 512K Words 16-bit Flash Memory (8 Mbits)
– Single Voltage Read/Write, 110 ns Access Time
– Sector Erase Architecture
– Fast Word Program Time of 20 µs; Fast Sector Erase Time of 200 ms
– Dual-plane Organization Allows Concurrent Read and Program/Erase
– Erase Suspend Capability
– Low-power Operation: 25 mA Active, 10 µA Standby
– Data Polling, Toggle Bit and Ready/Busy End of Program Cycle Detection
– Reset Input for Device Initialization
– Sector Program Unlock Command
– Factory-programmed AT91 Flash Uploader Software
• Fully Programmable External Bus Interface (EBI)
– Up to 8 Chip Selects, Maximum External Address Space of 64M Bytes
– Software Programmable 8/16-bit External Data Bus
• 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
• 2USARTs
– 2 Dedicated Peripheral Data Controller (PDC) Channels per USART
• Programmable Watchdog Timer
• Advanced Power-saving Features
– CPU and Peripherals Can be De-activated Individually
• Fully Static Operation:
– 0 Hz to 33 MHz Internal Frequency Range at 3.0V, 85°C
• 2.7V to 3.6V Operating Range
• -40°Cto85°C Temperature Range
• Available in a 120-ball BGA Package
Description
The AT91FR4081 is a member of the Atmel AT91 16/32-bit Microcontroller family,
which is based on the ARM7TDMI processor core. The 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 eight-level priority-vectored interrupt controller, together with the Peripheral Data
Controller, significantly enhance real-time device performance.
By combining the microcontroller, featuring more than 1 Mbit of on-chip SRAM and a
wide range of peripheral functions, with 8 Mbits of Flash memory in a single compact
120-ball BGA package, the Atmel AT91FR4081 provides a powerful, flexible and cost-
effective solution to many compute-intensive embedded control applications and
offers significant board size and system cost reductions.
The Flash memory may be programmed via the JTAG/ICE interface or the factory-pro-
grammed Flash Uploader using a single device supply, making the AT91FR4081 ideal
for in-system programmable applications.
AT91 ARM
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Microcontrollers
AT91FR4081
Rev. 1386C–ATARM–02/02
