SAM9X25 Atmel Corporation, SAM9X25 Datasheet - Page 170

• Manufacturer Part Number: SAM9X25
• Manufacturer: Atmel Corporation

Specifications of SAM9X25

• Flash (kbytes): 0 Kbytes
• Pin Count: 217
• Max. Operating Frequency: 400 MHz
• Cpu: ARM926
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 105
• Ext Interrupts: 105
• Usb Transceiver: 3
• Usb Speed: Hi-Speed
• Usb Interface: Host, Device
• Spi: 2
• Twi (i2c): 3
• Uart: 7
• Can: 2
• Lin: 4
• Ssc: 1
• Ethernet: 2
• Sd / Emmc: 2
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 12
• Adc Resolution (bits): 10
• Adc Speed (ksps): 440
• Resistive Touch Screen: No
• Temp. Sensor: No
• Crypto Engine: No
• Sram (kbytes): 32
• Self Program Memory: NO
• External Bus Interface: 1
• Dram Memory: DDR/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

21.3
21.4
170
170
CKGR Block Diagram
Slow Clock Selection
SAM9X25
SAM9X25
Figure 21-1. Clock Generator Block Diagram
The slow clock can be generated either by an external 32,768 Hz crystal or by the on-chip
32 kHz RC oscillator. The 32,768 Hz crystal oscillator can be bypassed by setting the bit
OSC32BYP to accept an external slow clock on XIN32.
The internal 32 kHz RC oscillator and the 32,768 Hz oscillator can be enabled by setting to 1,
respectively, RCEN bit and OSC32EN bit in the System Controller user interface. The OSCSEL
command selects the slow clock source.
XOUT32
XIN32
XOUT
XIN
Clock Generator
Management
12M RC OSC
32K RC OSC
12M Main
PLLA and
Slow Clock
Controller
Oscillator
Status
Oscillator
On Chip
On Chip
Divider
Power
UPLL
Control
RCEN
Slow Clock
SLCK
OSCSEL
OSC32EN
OSC32BYP
MOSCRCEN
MOSCSEL
Main Clock
MAINCK
UPLLCK
PLLA Clock
PLLACK
11054A–ATARM–27-Jul-11
11054A–ATARM–27-Jul-11