AT91FR40161-CI Atmel, AT91FR40161-CI Datasheet - Page 16

• Manufacturer Part Number: AT91FR40161-CI
• Description: IC MCU ARM7 2M FLASH 120-BGA
• Manufacturer: Atmel
• Series: AT91SAMr

Specifications of AT91FR40161-CI

• Core Processor: ARM7
• Core Size: 16/32-Bit
• Speed: 33MHz
• Connectivity: EBI/EMI, UART/USART
• Peripherals: WDT
• Number Of I /o: 32
• Program Memory Size: 2MB (1M x 16)
• Program Memory Type: FLASH
• Ram Size: 136K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 3.6 V
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 120-BGA
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Data Converters: -

System Peripherals
PS: Power-saving
AIC: Advanced Interrupt
Controller
PIO: Parallel I/O Controller
WD: Watchdog
SF: Special Function
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AT94FR40161
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 needs.
The Advanced Interrupt Controller has an 8-level priority, individually maskable, vec-
tored interrupt controller, and drives the NIRQ and NFIQ pins of the ARM7TDMI from:
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The AIC is extensively programmable offering maximum flexibility, and its vectoring fea-
tures reduce the real-time overhead in handling interrupts.
The AIC also features a spurious vector detection feature, which reduces spurious inter-
rupt handling to a minimum, and a protect mode that facilitates the debug capabilities.
The AT91FR40161 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 peripheral
to optimize the use of available package pins. The PIO controller enables generation of
an interrupt on input change and insertion of a simple input glitch filter 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 software becomes trapped in a deadlock. It can generate an internal reset or inter-
rupt, or assert an active level on the dedicated pin NWDOVF. All programming registers
are password-protected to prevent unintentional programming.
The AT91FR40161 provides registers that implement the following special functions.
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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
6040B–ATARM–03/04