AT91SAM9263 View Datasheet(PDF) - Atmel Corporation
Part Name
Description
MFG CO.
'AT91SAM9263' PDF : 52 Pages View PDF
5. Power Considerations
5.1 Power Supplies
AT91SAM9263 has several types of power supply pins:
z VDDCORE pins: Power the core, including the processor, the embedded memories and the peripherals; voltage
ranges from 1.08V to 1.32V, 1.2V nominal.
z VDDIOM0 and VDDIOM1 pins: Power the External Bus Interface 0 I/O lines and the External Bus Interface 1 I/O
lines, respectively; voltage ranges between 1.65V and 1.95V (1.8V nominal) or between 3.0V and 3.6V (3.3V
nominal).
z VDDIOP0 pins: Power the Peripheral I/O lines and the USB transceivers; voltage ranges from 2.7V to 3.6V, 3.3V
nominal.
z VDDIOP1 pins: Power the Peripheral I/O lines involving the Image Sensor Interface; voltage ranges from 1.65V to
3.6V, 1.8V, 2.5V, 3V or 3.3V nominal.
z VDDBU pin: Powers the Slow Clock oscillator and a part of the System Controller; voltage ranges from 1.08V to
1.32V, 1.2V nominal.
z VDDPLL pin: Powers the PLL cells; voltage ranges from 3.0V to 3.6V, 3.3V nominal.
z VDDOSC pin: Powers the Main Oscillator cells; voltage ranges from 3.0V to 3.6V, L3.3V nominal.
The power supplies VDDIOM0, VDDIOM1 and VDDIOP0, 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 VDDOSC, VDDCORE, VDDIOM0, VDDIOM1, VDDIOP0 and VDDIOP1 pins power
supplies. Separated ground pins are provided for VDDBU and VDDPLL. These ground pins are respectively GNDBU and
GNDPLL.
5.2 Power Consumption
The AT91SAM9263 consumes about 700 µA (worst case) of static current on VDDCORE at 25°C. This static current
rises at up to 7 mA if the temperature increases to 85°C.
On VDDBU, the current does not exceed 3 μA @25°C, but can rise at up to 20 μA @85°C. An automatic switch to
VDDCORE guarantees low power consumption on the battery when the system is on.
For dynamic power consumption, the AT91SAM9263 consumes a maximum of 70 mA on VDDCORE at maximum
conditions (1.2V, 25°C, processor running full-performance algorithm).
5.3 Programmable I/O Lines Power Supplies
The power supply pins VDDIOM0 and VDDIOM1 accept two voltage ranges. This allows the device to reach its
maximum speed, either out of 1.8V or 3.0V external memories.
The maximum speed is 100 MHz on the pin SDCK (SDRAM Clock) loaded with 10 pF. The other signals (control,
address and data signals) do not go over 50 MHz, loaded with 30 pF for power supply at 1.8V and 50 pF for power
supply at 3.3V.
The voltage ranges are determined by programming registers in the Chip Configuration registers 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. However,
the device cannot reach its maximum speed if the voltage supplied to the pins is only 1.8V without reprogramming the
EBI0 voltage range. The user must be sure to program the EBI0 voltage range before getting the device out of its Slow
Clock Mode.
SAM9263 [Summary] 13
6249IS–ATARM–28-Jan-13
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