SAM9G20 Atmel Corporation, SAM9G20 Datasheet - Page 770

• 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

41.5.3
Table 41-12. RC Oscillator Characteristics
41.5.4
770
Symbol
1/(t
t
ST
CPRCz
)
AT91SAM9G20
RC Oscillator Characteristics
Slow Clock Selection
Parameter
Crystal Oscillator Frequency
Duty Cycle
Startup Time
Table 41-13
Table 41-13. Slow Clock Selection
The startup counter delay for the slow clock oscillator depends on the OSCSEL signal. The
32,768 Hz startup delay is 1200 ms whereas it is 150 µs for the internal RC oscillator (refer to
Table
the device.
OSCSEL
0
1
41-13). The pin OSCSEL must be tied either to GND or VDDBU for correct operation of
defines the states for OSCSEL signal.
Conditions
Slow Clock
Internal RC
External 32768Hz
Startup Time (Max)
150 µs
1200 ms
Min
20
45
Typ
32
6384E–ATARM–05-Feb-10
Max
44
55
75
Unit
kHz
µs
%