SAM9G20 Atmel Corporation, SAM9G20 Datasheet - Page 13

• Manufacturer Part Number: SAM9G20
• Manufacturer: Atmel Corporation

Specifications of SAM9G20

• Flash (kbytes): 0 Kbytes
• Pin Count: 217
• Max. Operating Frequency: 400 MHz
• Cpu: ARM926
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 96
• Ext Interrupts: 96
• Usb Transceiver: 3
• Usb Speed: Full Speed
• Usb Interface: Host, Device
• Spi: 2
• Twi (i2c): 1
• Uart: 7
• Ssc: 1
• Ethernet: 1
• Sd / Emmc: 1
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: Yes
• Adc Channels: 4
• Adc Resolution (bits): 10
• Adc Speed (ksps): 95
• Resistive Touch Screen: No
• Temp. Sensor: No
• Crypto Engine: No
• Sram (kbytes): 32
• Self Program Memory: NO
• External Bus Interface: 1
• Dram Memory: sdram
• Nand Interface: Yes
• Picopower: No
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 1.8/3.3
• Operating Voltage (vcc): 0.9 to 1.1
• Fpu: No
• Mpu / Mmu: No/Yes
• Timers: 6
• Output Compare Channels: 6
• Input Capture Channels: 6
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: No

5. Power Considerations
5.1
5.2
6384DS–ATARM–13-Jan-10
Power Supplies
Programmable I/O Lines
The AT91SAM9G20 has several types of power supply pins:
Ground pins GND are common to VDDCORE, VDDIOM, VDDOSC and VDDIOP pins power
supplies. Separated ground pins are provided for VDDBU, VDDPLL, VDDUSB and VDDANA.
These ground pins are respectively GNDBU, GNDPLL, GNDUSB and GNDANA.
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 maximum speed is 133 MHz on the pin SDCK (SDRAM Clock) loaded with 10 pF. The other
signals (control, address and data signals) do not go over 66 MHz, loaded with 30 pF for power
supply at 1.8V and 50 pF for power supply at 3.3V.
The EBI I/Os accept two slew rate modes, Fast and Slow. This allows to adapt the rising and fall-
ing time on SDRAM clock, control and data to the bus load.
The voltage ranges and the slew rates are determined by programming VDDIOMSEL and IOSR
bits 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. The user must make sure to program the EBI voltage range before getting the
device out of its Slow Clock Mode.
At reset, the selected slew rates defaults are Fast.
• VDDCORE pins: Power the core, including the processor, the embedded memories and the
• VDDIOM pins: Power the External Bus Interface I/O lines; voltage ranges between 1.65V and
• VDDIOP pins: Power the Peripherals I/O lines; voltage ranges from 1.65V to 3.6V.
• VDDBU pin: Powers the Slow Clock oscillator, the internal RC oscillator and a part of the
• VDDPLL pin: Powers the PLL cells; voltage ranges from 0.9V to 1.1V.
• VDDOSC pin: Powers the Main Oscillator cells; voltage ranges from 1.65V to 3.6V
• VDDANA pin: Powers the Analog to Digital Converter; voltage ranges from 3.0V to 3.6V, 3.3V
• VDDUSB pin: Powers USB transceiver; voltage ranges from 3.0V to 3.6V.
peripherals; voltage ranges from 0.9V to 1.1V, 1.0V nominal.
1.95V (1.8V typical) or between 3.0V and 3.6V (3.3V nominal). The voltage range is
selectable by software.
System Controller; voltage ranges from 0.9V to 1.1V, 1.0V nominal.
nominal.
AT91SAM9G20 Summary
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