SAM9261 Atmel Corporation, SAM9261 Datasheet - Page 24

• Manufacturer Part Number: SAM9261
• Manufacturer: Atmel Corporation

Specifications of SAM9261

• Flash (kbytes): 0 Kbytes
• Pin Count: 217
• Max. Operating Frequency: 240 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: 4
• Ssc: 3
• Sd / Emmc: 1
• Graphic Lcd: Yes
• Video Decoder: No
• Camera Interface: No
• Resistive Touch Screen: No
• Temp. Sensor: No
• Crypto Engine: No
• Sram (kbytes): 160
• 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): 1.08 to 1.32
• Fpu: No
• Mpu / Mmu: No/Yes
• Timers: 3
• Output Compare Channels: 3
• Input Capture Channels: 3
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: No

9.2
9.3
9.4
9.5
24
Reset Controller
Shutdown Controller
General-purpose Backup Registers
Clock Generator
AT91SAM9261
Figure 9-2.
• Based on two Power-on-Reset cells
• Status of the last reset
• Controls the internal resets and the NRST pin output
• Shutdown and Wake-up logic:
• Four 32-bit general-purpose backup registers
• Embeds the Low-power 32768 Hz Slow Clock Oscillator
• Embeds the Main Oscillator
• Embeds Two PLLs
• Provides SLCK, MAINCK, PLLACK and PLLBCK.
– Either cold reset, first reset, soft reset, user reset, watchdog reset, wake-up reset
– Software programmable assertion of the SHDN pin
– Deassertion Programmable on a WKUP pin level change or on alarm
– Provides the permanent Slow Clock to the system
– Oscillator bypass feature
– Supports 3 to 20 MHz crystals
– Outputs 80 to 240 MHz clocks
– Integrates an input divider to increase output accuracy
– 1 MHz minimum input frequency
Clock Generator Block Diagram
XOUT32
PLLRCA
PLLRCB
XIN32
XOUT
XIN
Clock Generator
Management
Slow Clock
Controller
Oscillator
Oscillator
Divider A
Divider B
Status
PLL and
PLL and
Power
Main
Control
Slow Clock
SLCK
Main Clock
MAINCK
PLLA Clock
PLLACK
PLLB Clock
PLLBCK
6062LS–ATARM–23-Mar-09