AT91SAM9260 ATMEL Corporation, AT91SAM9260 Datasheet - Page 14

• Manufacturer Part Number: AT91SAM9260
• Description: AT91 ARM Thumb Microcontrollers
• Manufacturer: ATMEL Corporation

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5. Power Considerations
5.1
5.2
5.3
14
Power Supplies
Power Consumption
Programmable I/O Lines Power Supplies
AT91SAM9260 Preliminary
The AT91SAM9260 has several types of power supply pins:
The power supplies VDDIOM, VDDIOP0 and VDDIOP1 are identified in the pinout table and
the multiplexing tables. These supplies enable the user to power the device differently for
interfacing with memories and for interfacing with peripherals.
Ground pins GND are common to VDDCORE, VDDIOM, VDDIOP0 and VDDIOP1 pins power
supplies. Separated ground pins are provided for VDDBU, VDDPLL and VDDANA. These
ground pins are respectively GNDBU, GNDOSC, GNDPLL and GNDANA.
The AT91SAM9260 consumes about 500 µA of static current on VDDCORE at 25°C. This
static current rises up to 5 mA if the temperature increases to 85°C.
On VDDBU, the current does not exceed 10 µA in worst case conditions.
For dynamic power consumption, the AT91SAM9260 consumes a maximum of 100 mA on
VDDCORE at maximum conditions (1.8V, 25°C, processor running full-performance algorithm
out of high speed memories).
The power supplies pins VDDIOM accept two voltage ranges. This allows the device to reach
its maximum speed either out of 1.8V or 3.3V external memories.
The target maximum speed is 100 MHz on the pin SDCK (SDRAM Clock) loaded with 30 pF
for power supply at 1.8V and 50 pF for power supply at 3.3V. The other signals (control,
address and data signals) do not exceed 50 MHz.
The voltage ranges are determined by programming registers in the Chip Configuration regis-
ters located in the Matrix User Interface.
At reset, the selected voltage defaults to 3.3V nominal, and power supply pins can accept
either 1.8V or 3.3V. Obviously, the device cannot reach its maximum speed if the voltage sup-
• VDDCORE pins: Power the core, including the processor, the embedded memories and
• VDDIOM pins: Power the External Bus Interface I/O lines; voltage ranges between 1.65V
• VDDIOP0 pins: Power the Peripheral I/O lines and the USB transceivers; voltage ranges
• VDDIOP1 pins: Power the Peripherals I/O lines involving the Image Sensor Interface;
• VDDBU pin: Powers the Slow Clock oscillator and a part of the System Controller; voltage
• VDDPLL pin: Powers the PLL cells; voltage ranges from 1.65V and 1.95V, 1.8V nominal.
• VDDANA pin: Powers the Analog to Digital Converter; voltage ranges from 3.0V and 3.6V,
the peripherals; voltage ranges from 1.65V and 1.95V, 1.8V nominal.
and 1.95V (1.8V typical) or between 3.0V and 3.6V (3.3V nominal). The expected voltage
range is selectable by software.
from 3.0V and 3.6V, 3V or 3.3V nominal.
voltage ranges from 1.65V and 3.6V, 1.8V, 2.5V, 3V or 3.3V nominal.
ranges from 1.65V to 1.95V, 1.8V nominal.
3.3V nominal.
6221DS–ATARM–22-Sep-06