AT91R40008-66AI Atmel, AT91R40008-66AI Datasheet - Page 12

• Manufacturer Part Number: AT91R40008-66AI
• Description: IC ARM7 MCU 176 TQFP
• Manufacturer: Atmel
• Series: AT91SAMr

Specifications of AT91R40008-66AI

• Core Processor: ARM7
• Core Size: 16/32-Bit
• Speed: 66MHz
• Connectivity: EBI/EMI, UART/USART
• Peripherals: POR, WDT
• Number Of I /o: 32
• Program Memory Type: ROMless
• Ram Size: 256K x 8
• Voltage - Supply (vcc/vdd): 1.65 V ~ 1.95 V
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 100-TQFP, 100-VQFP
• For Use With: AT91EB40A - KIT EVAL FOR ARM AT91R40008
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Program Memory Size: -
• Data Converters: -

8.1
8.1.1
8.1.2
8.1.3
8.1.4
8.1.5
12
System Peripherals
AT91R40008
PS: Power-saving
AIC: Advanced Interrupt Controller
PIO: Parallel I/O Controller
WD: Watchdog
SF: Special Function
The Power-saving feature optimizes power consumption, enabling the software to stop the
ARM7TDMI clock (Idle mode), restarting it when the module receives an interrupt (or reset). It
also enables on-chip peripheral clocks to be enabled and disabled individually, matching
power consumption and application need.
The Advanced Interrupt Controller has an 8-level priority, individually maskable, vectored
interrupt controller, and drives the NIRQ and NFIQ pins of the ARM7TDMI from:
The AIC is extensively programmable offering maximum flexibility, and its vectoring features
reduce the real-time overhead in handling interrupts.
The AIC also features a spurious vector, which reduces spurious interrupt handling to a mini-
mum, and a protect mode that facilitates the debug capabilities.
The AT91R40008 microcontroller has 32 programmable I/O lines. Six pins are dedicated as
general-purpose I/O pins. Other I/O lines are multiplexed with an external signal of a periph-
eral to optimize the use of available package pins. The PIO controller enables generation of an
interrupt on input change on any of the PIO pins.
The Watchdog is built around a 16-bit counter and is used to prevent system lock-up if the soft-
ware becomes trapped in a deadlock. It can generate an internal reset or interrupt, or assert
an active level on the dedicated pin NWDOVF. All programming registers are password-pro-
tected to prevent unintentional programming.
The AT91R40008 microcontroller provides registers that implement the following special
functions:
• The external fast interrupt line (FIQ)
• The three external interrupt request lines (IRQ0 - IRQ2)
• The interrupt signals from the on-chip peripherals
• Chip identification
• RESET status
• Protect mode
1732FS–ATARM–12-Apr-06