SAM3U4C Atmel Corporation, SAM3U4C Datasheet - Page 38
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SAM3U4C
Manufacturer Part Number
SAM3U4C
Description
Manufacturer
Atmel Corporation
Specifications of SAM3U4C
Flash (kbytes)
256 Kbytes
Pin Count
100
Max. Operating Frequency
96 MHz
Cpu
Cortex-M3
# Of Touch Channels
28
Hardware Qtouch Acquisition
No
Max I/o Pins
57
Ext Interrupts
57
Usb Transceiver
1
Quadrature Decoder Channels
1
Usb Speed
Hi-Speed
Usb Interface
Device
Spi
4
Twi (i2c)
1
Uart
4
Ssc
1
Sd / Emmc
1
Graphic Lcd
No
Video Decoder
No
Camera Interface
No
Adc Channels
8
Adc Resolution (bits)
12
Adc Speed (ksps)
384
Resistive Touch Screen
No
Temp. Sensor
No
Crypto Engine
No
Sram (kbytes)
50
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
10.5
38
Clock Generator
SAM3U Series
The Slow Clock generator is based on a 32 kHz crystal oscillator and an embedded 32 kHz RC
oscillator. The Slow Clock defaults to the RC oscillator, but the software can enable the crystal
oscillator and select it as the Slow Clock source.
The Supply Controller starts up the device by enabling the Voltage Regulator, then it generates
the proper reset signals to the core power supply.
It also enables to set the system in different low power modes and to wake it up from a wide
range of events.
The Clock Generator is made up of:
Figure 10-2. Clock Generator Block Diagram
• One Low Power 32768 Hz Slow Clock Oscillator with bypass mode
• One Low Power RC Oscillator
• One 3 to 20 MHz Crystal Oscillator, which can be bypassed
• One Fast RC Oscillator factory programmed, 3 output frequencies can be selected: 4, 8 or 12
• One 480 MHz UPLL providing a clock for the USB High Speed Device Controller. Input
• One 96 to 192 MHz programmable PLL (PLL A), capable to provide the clock MCK to the
MHz. By default 4 MHz is selected. 8 MHz and 12 MHz output are factory calibrated.
frequency is 12 MHz (only).
processor and to the peripherals. The input frequency of the PLL A is between 8 and 16 MHz.
XOUT32
XIN32
XOUT
XIN
Management
Clock Generator
32k RC OSC
Slow Clock
12M Main
12/8/4 MHz
Controller
Status
Oscillator
Oscillator
PLL and
Divider A
On Chip
On Chip
RC OSC
Power
PLL B
Divider
/6 /8
Control
XTALSEL
Slow Clock
SLCK
Main Clock
MAINCK
MAINSEL
HSCK
UPLL Clock
UPLLCK
PLLA Clock
PLLACK
6430ES–ATARM–22-Aug-11