SAM9G20 Atmel Corporation, SAM9G20 Datasheet - Page 307

• Manufacturer Part Number: SAM9G20
• Manufacturer: Atmel Corporation

Specifications of SAM9G20

• Flash (kbytes): 0 Kbytes
• Pin Count: 217
• Max. Operating Frequency: 400 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: 7
• 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): 95
• 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): 0.9 to 1.1
• Fpu: No
• Mpu / Mmu: No/Yes
• Timers: 6
• Output Compare Channels: 6
• Input Capture Channels: 6
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: No

26.9.11
Register Name:PMC_MCKR
Access Type:Read-write
• CSS: Master/Processor Clock Source Selection
• PRES: Master/Processor Clock Prescaler
• MDIV: Master Clock Division
6384E–ATARM–05-Feb-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
–
–
–
6
–
0
1
0
1
29
21
13
–
–
–
5
–
CSS
PRES
0
0
1
1
0
0
1
1
Master Clock Division
Master Clock is Prescaler Output Clock divided by 1.
Master Clock is Prescaler Output Clock divided by 2.
Master Clock is Prescaler Output Clock divided by 4.
Master Clock is Prescaler Output Clock divided by 6.
PDIV
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
PLLA Clock is selected
PLLB Clock is selected
26
18
10
–
–
–
2
Master/Processor Clock Dividers
Input 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
AT91SAM9G20
25
17
–
–
9
1
MDIV
CSS
24
16
–
–
8
0
307