SAM3S16C Atmel Corporation, SAM3S16C Datasheet - Page 432

• Manufacturer Part Number: SAM3S16C
• Manufacturer: Atmel Corporation

Specifications of SAM3S16C

• Flash (kbytes): 1024 Kbytes
• Pin Count: 100
• Max. Operating Frequency: 100 MHz
• Cpu: Cortex-M3
• # Of Touch Channels: 39
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 79
• Ext Interrupts: 79
• Usb Transceiver: 1
• Quadrature Decoder Channels: 2
• Usb Speed: Full Speed
• Usb Interface: Device
• Spi: 3
• Twi (i2c): 2
• Uart: 4
• Ssc: 1
• Sd / Emmc: 1
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 16
• Adc Resolution (bits): 12
• Adc Speed (ksps): 1000
• Analog Comparators: 1
• Resistive Touch Screen: No
• Dac Channels: 2
• Dac Resolution (bits): 12
• Temp. Sensor: Yes
• Crypto Engine: No
• Sram (kbytes): 128
• 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: 6
• Output Compare Channels: 6
• Input Capture Channels: 6
• Pwm Channels: 4
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: Yes

27.5
390
Main Clock
SAM3S16
the XIN32 pin are given in the product electrical characteristics section. In order to set the
bypass mode, the OSCBYPASS bit of the Supply Controller Mode Register (SUPC_MR) needs
to be set at 1.
The user can set the Slow Clock Crystal Oscillator in bypass mode instead of connecting a crys-
tal. In this case, the user has to provide the external clock signal on XIN32. The input
characteristics of the XIN32 pin under these conditions are given in the product electrical char-
acteristics section.
The programmer has to be sure to set the OSCBYPASS bit in the Supply Controller Mode Reg-
ister (SUPC_MR) and XTALSEL bit in the Supply Controller Control Register (SUPC_CR).
Figure 27-3
Figure 27-3. Main Clock Block Diagram
The Main Clock has two sources:
• 4/8/12 MHz Fast RC Oscillator which starts very quickly and is used at startup
• 3 to 20 MHz Crystal or Ceramic Resonator-based Oscillator which can be bypassed
XOUT/PB8
Slow Clock
shows the Main Clock block diagram.
XIN/PB9
SLCK
MOSCRCEN
MOSCRCEN
Ceramic Resonator
MOSCXTCNT
Main Clock
MOSCXTEN
4/8/12 MHz
MOSCXTEN
Frequency
3-20 MHz
Oscillator
Oscillator
3-20 MHz
Oscillator
Fast RC
Counter
Counter
Crystal
or
MOSCRCF
MOSCSEL
MAINRDY
MOSCRCS
MOSCXTS
MOSCSEL
MAINF
0
1
Main Clock
MOSCSELS
MAINCK
11117B–ATARM–18-Oct-11