SAM9XE256 Atmel Corporation, SAM9XE256 Datasheet - Page 342

• Manufacturer Part Number: SAM9XE256
• Manufacturer: Atmel Corporation

Specifications of SAM9XE256

• Flash (kbytes): 256 Kbytes
• Pin Count: 217
• Max. Operating Frequency: 180 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): 2
• Uart: 6
• Ssc: 1
• Ethernet: 1
• Sd / Emmc: 1
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: Yes
• Adc Channels: 4
• Adc Resolution (bits): 10
• Adc Speed (ksps): 312
• Resistive Touch Screen: No
• Temp. Sensor: No
• Crypto Engine: No
• Sram (kbytes): 32
• 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): 1.65 to 1.95
• Fpu: No
• Mpu / Mmu: No / Yes
• Timers: 6
• Output Compare Channels: 6
• Input Capture Channels: 6
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: No

28.9.11
Register Name:
Address:
Access Type:
• CSS: Master Clock Selection
• PRES: Processor Clock Prescaler
• MDIV: Master Clock Division
6254C–ATARM–22-Jan-10
31
23
15
–
–
–
7
–
0
0
1
1
PMC Master Clock Register
0
0
0
0
1
1
1
1
MDIV
0
0
1
1
30
22
14
PMC_MCKR
0xFFFFFC30
Read-write
–
–
–
6
–
0
1
0
1
29
21
13
–
–
–
5
–
CSS
Master Clock Division
Master Clock is Processor Clock.
Master Clock is Processor Clock divided by 2.
Master Clock is Processor Clock divided by 4.
Reserved.
PRES
0
0
1
1
0
0
1
1
AT91SAM9XE128/256/512 Preliminary
28
20
12
–
–
–
4
0
1
0
1
PRES
27
19
11
–
–
–
3
0
1
0
1
0
1
0
1
Clock Source Selection
Slow Clock is selected
Main Clock is selected
PLL A Clock is selected
PLL B Clock is selected
26
18
10
–
–
–
2
Processor Clock
Selected clock
Selected clock divided by 2
Selected clock divided by 4
Selected clock divided by 8
Selected clock divided by 16
Selected clock divided by 32
Selected clock divided by 64
Reserved
25
17
–
–
9
1
MDIV
CSS
24
16
–
–
8
0
342