SAM9M11 Atmel Corporation, SAM9M11 Datasheet - Page 32

• Manufacturer Part Number: SAM9M11
• Manufacturer: Atmel Corporation

Specifications of SAM9M11

• 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: Yes
• Camera Interface: Yes
• Adc Channels: 8
• Adc Resolution (bits): 10
• Adc Speed (ksps): 440
• Resistive Touch Screen: Yes
• Dac Resolution (bits): No
• Temp. Sensor: No
• Crypto Engine: AES/DES
• 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

8.6
32
Slow Clock Selection
SAM9M11
Figure 8-2.
The SAM9M11 slow clock can be generated either by an external 32768Hz crystal or the on-
chip RC oscillator. The 32768 Hz crystal oscillator can be bypassed, by setting the bit
OSC32BYP, to accept an external slow clock on XIN32.
The internal RC oscillator and the 32768 Hz oscillator can be enabled by setting to 1 respec-
tively RCEN bit and OSC32EN bit in the system controller user interface. OSCSEL command
selects the slow clock source.
RCEN, OSC32EN,OSCSEL and OSC32BYP bits are located in the slow clock control register
(SCKCR) located at address 0xFFFFFD50 in the backup part of the system controller and so are
preserved while VDDBU is present.
Clock Generator Block Diagram
XOUT32
XIN32
XOUT
XIN
Clock Generator
Management
12M Main
PLLA and
Slow Clock
Controller
On Chip
RC OSC
Oscillator
Status
Oscillator
Divider
Power
UPLL
Control
RCEN
Slow Clock
SLCK
OSCSEL
OSC32EN
OSC32BYP
Main Clock
MAINCK
UPLLCK
PLLA Clock
PLLACK
6437CS–ATARM–8-Apr-11