AT91M40800-33AU Atmel, AT91M40800-33AU Datasheet - Page 50

• Manufacturer Part Number: AT91M40800-33AU
• Description: IC ARM7 MCU 100 LQFP
• Manufacturer: Atmel
• Series: AT91SAMr

Specifications of AT91M40800-33AU

• Core Processor: ARM7
• Core Size: 16/32-Bit
• Speed: 33MHz
• Connectivity: EBI/EMI, UART/USART
• Peripherals: POR, WDT
• Number Of I /o: 32
• Program Memory Type: ROMless
• Ram Size: 8K x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 3.6 V
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 100-LQFP
• Package: 100TQFP
• Device Core: ARM7TDMI
• Family Name: 91M
• Maximum Speed: 33 MHz
• Operating Supply Voltage: 2.5|3.3 V
• Data Bus Width: 32 Bit
• Number Of Programmable I/os: 32
• Interface Type: EBI/USART
• Number Of Timers: 3
• Processor Series: AT91Mx
• Core: ARM7TDMI
• Data Ram Size: 8 KB
• Maximum Clock Frequency: 33 MHz
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: JTRACE-ARM-2M, MDK-ARM, RL-ARM, ULINK2
• Minimum Operating Temperature: - 40 C
• Eeprom Memory: 0 Bytes
• Input Output: 32
• Interface: EBI/EMI, UART/USART
• Ios: 32
• Memory Type: ROMless
• Number Of Bits: 32
• Package Type: 100-pin LQFP
• Programmable Memory: 0 Bytes
• Timers: 3-16-bit
• Voltage, Range: 1.8-3.6 V
• Cpu Family: 91M
• Device Core Size: 32b
• Frequency (max): 33MHz
• Program Memory Size: Not Required
• Total Internal Ram Size: 8KB
• # I/os (max): 32
• Number Of Timers - General Purpose: 3
• Operating Supply Voltage (typ): 2.5/3.3V
• Operating Supply Voltage (max): 3.6V
• Operating Supply Voltage (min): 1.8V
• Instruction Set Architecture: RISC
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 100
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Program Memory Size: -
• Data Converters: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

PS: Power-saving
Peripheral Clocks
50
AT91X40 Series
The AT91X40 Series’ Power-saving feature enables optimization of power consumption.
The PS controls the CPU and Peripheral Clocks. One control register (PS_CR) enables
the user to stop the ARM7TDMI Clock and enter Idle Mode. One set of registers with a
set/clear mechanism enables and disables the peripheral clocks individually.
The ARM7TDMI clock is enabled after a reset and is automatically re-enabled by any
enabled interrupt in the Idle Mode.
The clock of each peripheral integrated in the AT91X40 Series can be individually
enabled and disabled by writing to the Peripheral Clock Enable (PS_PCER) and Periph-
eral Clock Disable Registers (PS_PCDR). The status of the peripheral clocks can be
read in the Peripheral Clock Status Register (PS_PCSR).
When a peripheral clock is disabled, the clock is immediately stopped. When the clock is
re-enabled, the peripheral resumes action where it left off.
To avoid data corruption or erroneous behavior of the system, the system software only
disables the clock after all programmed peripheral operations have finished.
The peripheral clocks are automatically enabled after a reset.
The bits that control the peripheral clocks are the same as those that control the Inter-
rupt Sources in the AIC.
1354D–ATARM–08/02