SAM9G45 Atmel Corporation, SAM9G45 Datasheet - Page 304

• 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

25.11 Clock Switching Details
25.11.1
25.11.2
304
SAM9G45
Master Clock Switching Timings
Clock Switching Waveforms
Table 25-1
selected clock to another one. This is in the event that the prescaler is de-activated. When the
prescaler is activated, an additional time of 64 clock cycles of the new selected clock has to be
added.
Table 25-1.
Figure 25-3. Switch Master Clock from Slow Clock to PLLA Clock
To
Main Clock
SLCK
PLLA Clock
Write PMC_MCKR
From
Master Clock
gives the worst case timings required for the Master Clock to switch from one
Slow Clock
PLL Clock
MCKRDY
Clock Switching Timings (Worst Case)
LOCK
PLLACOUNT x SLCK +
0.5 x Main Clock +
0.5 x Main Clock +
2.5 x PLLAx Clock
Main Clock
4.5 x SLCK
4 x SLCK +
–
PLLACOUNT x SLCK
2.5 x PLLA Clock +
2.5 x Main Clock
4 x SLCK +
5 x SLCK +
SLCK
–
PLLACOUNT x SLCK
2.5 x PLLA Clock +
3 x PLLA Clock +
3 x PLLA Clock +
1 x Main Clock
6438G–ATARM–19-Apr-11
PLLA Clock
4 x SLCK +
4 x SLCK +
5 x SLCK