SAM3S1B Atmel Corporation, SAM3S1B Datasheet - Page 225

• Manufacturer Part Number: SAM3S1B
• Manufacturer: Atmel Corporation

Specifications of SAM3S1B

• Flash (kbytes): 64 Kbytes
• Pin Count: 64
• Max. Operating Frequency: 64 MHz
• Cpu: Cortex-M3
• # Of Touch Channels: 23
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 34
• Ext Interrupts: 34
• Usb Transceiver: 1
• Quadrature Decoder Channels: 1
• 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: 10
• 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): 16
• Self Program Memory: YES
• 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

12.3.3
12.3.4
12.3.4.1
Figure 12-3. General Reset State
6500C–ATARM–8-Feb-11
backup_nreset
periph_nreset
proc_nreset
(nrst_out)
RSTTYP
SLCK
NRST
MCK
Brownout Manager
Reset States
General Reset
As the ERSTL field is within RSTC_MR register, which is backed-up, it can be used to shape the
system power-up reset for devices requiring a longer startup time than the Slow Clock Oscillator.
The Brownout manager is embedded within the Supply Controller, please refer to the product
Supply Controller section for a detailed description.
The Reset State Manager handles the different reset sources and generates the internal reset
signals. It reports the reset status in the field RSTTYP of the Status Register (RSTC_SR). The
update of the field RSTTYP is performed when the processor reset is released.
A general reset occurs when a Power-on-reset is detected, a Brownout or a Voltage regulation
loss is detected by the Supply controller. The vddcore_nreset signal is asserted by the Supply
Controller when a general reset occurs.
All the reset signals are released and the field RSTTYP in RSTC_SR reports a General Reset.
As the RSTC_MR is reset, the NRST line rises 2 cycles after the vddcore_nreset, as ERSTL
defaults at value 0x0.
Figure 12-3
shows how the General Reset affects the reset signals.
XXX
EXTERNAL RESET LENGTH
= 2 cycles
Processor Startup
= 2 cycles
0x0 = General Reset
Freq.
Any
SAM3S
XXX
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