SAM3U2E Atmel Corporation, SAM3U2E Datasheet - Page 490

• Manufacturer Part Number: SAM3U2E
• Manufacturer: Atmel Corporation

Specifications of SAM3U2E

• Flash (kbytes): 128 Kbytes
• Pin Count: 144
• Max. Operating Frequency: 96 MHz
• Cpu: Cortex-M3
• # Of Touch Channels: 57
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 96
• Ext Interrupts: 96
• Usb Transceiver: 1
• Quadrature Decoder Channels: 1
• Usb Speed: Hi-Speed
• Usb Interface: Device
• Spi: 5
• Twi (i2c): 2
• Uart: 5
• Ssc: 1
• Sd / Emmc: 1
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 16
• Adc Resolution (bits): 12
• Adc Speed (ksps): 384
• Resistive Touch Screen: No
• Temp. Sensor: No
• Crypto Engine: No
• Sram (kbytes): 36
• Self Program Memory: YES
• External Bus Interface: 1
• Dram Memory: No
• Nand Interface: Yes
• Picopower: No
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 1.8/3.3
• Operating Voltage (vcc): 1.62 to 3.6
• Fpu: No
• Mpu / Mmu: Yes / No
• Timers: 3
• Output Compare Channels: 3
• Input Capture Channels: 3
• Pwm Channels: 4
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: Yes

28.14.12 PMC Programmable Clock Register
Name:
Address:
Access:
This register can only be written if the WPEN bit is cleared in the
• CSS: Master Clock Source Selection
• PRES: Programmable Clock Prescaler
490
31
23
15
–
–
–
7
–
SAM3U Series
Value
Value
0
1
2
3
4
0
1
2
3
4
5
6
PMC_PCKx
0x400E0440
Read-write
30
22
14
–
–
–
6
Name
SLOW_CLK
MAIN_CLK
PLLA_CLK
UPLL_CLK
MCK
Name
PRES
CLK_16
CLK_32
CLK_64
CLK_1
CLK_2
CLK_4
CLK_8
29
21
13
–
–
–
5
28
20
12
–
–
–
4
Description
Slow Clock is selected
Main Clock is selected
PLLA Clock is selected
UPLL/2 Clock is selected
Master Clock is selected
Description
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
“PMC Write Protect Mode
27
19
11
–
–
–
–
3
26
18
10
–
–
–
2
Register”.
CSS
25
17
–
–
–
9
1
6430E–ATARM–29-Aug-11
24
16
–
–
8
–
0