SAM9G45 Atmel Corporation, SAM9G45 Datasheet - Page 179

• Manufacturer Part Number: SAM9G45
• Manufacturer: Atmel Corporation

Specifications of SAM9G45

• Flash (kbytes): 0 Kbytes
• Pin Count: 324
• Max. Operating Frequency: 400 MHz
• Cpu: ARM926
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 160
• Ext Interrupts: 160
• Usb Transceiver: 3
• Usb Speed: Hi-Speed
• Usb Interface: Host, Device
• Spi: 2
• Twi (i2c): 2
• Uart: 5
• Lin: 4
• Ssc: 2
• Ethernet: 1
• Sd / Emmc: 2
• Graphic Lcd: Yes
• Video Decoder: No
• Camera Interface: Yes
• Adc Channels: 8
• Adc Resolution (bits): 10
• Adc Speed (ksps): 440
• Resistive Touch Screen: Yes
• Temp. Sensor: No
• Crypto Engine: No
• Sram (kbytes): 64
• Self Program Memory: NO
• External Bus Interface: 2
• Dram Memory: DDR2/LPDDR, SDRAM/LPSDR
• 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
• Pwm Channels: 4
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: No

21.6.1
Figure 21-5. PMC Startup
11053B–ATARM–22-Sep-11
External Main Cock
Main Supply
POR output
12 MHz RC
System starts on 32 kHz RC
RCEN = 1
OSC32EN = 0
OSCSEL = 0
MOSCRCEN = 1
MOSCXTEN = 0
MOSCSEL = 0
PMC_MCKR = 1
Fast wake-up
12 MHz RC Startup Time
Figure 21-4. Main Clock Selection
MOSCRCEN, MOSCXTEN, MOSCSEL and MOSCXTBY bits are located in the PMC Clock
Generator Main Oscillator Register (CKGR_MOR).
After a VDDBU power on reset, the default configuration is MOSCRCEN = 1, MOSCXTEN = 0
and MOSCSEL = 0, the 12 MHz RC oscillator is started as Main clock.
To speed up the wake-up phase, the system boots on 12 MHz RC (Main Clock). This allows the
user to perform system configuration (PLL, DDR2, etc.) at 12 MHz instead of 32 kHz during
12 MHz oscillator start-up.
Wait MOSCRCS = 1
System switches on Main Clock
to speed-up the boot
System is running at 12 MHz
External oscillator
is started for better accuracy
MOSCXTEN = 1
MOSCSEL = 0
XOUT
XIN
Crystal Startup Time
12M RC OSC
Main Clock
Oscillator
On Chip
Wait MOSCXTS = 1
User switches on external oscillator
MOSCSEL=1
Wait while MOSCSELS =1
System is runnning on 12 MHz Crystal
PLL can be used
MOSCRCEN
Main Clock
MOSCSEL
MOSCXTEN
MOSCXTBY
SAM9G35
179