SAM3S1B Atmel Corporation, SAM3S1B Datasheet - Page 392
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SAM3S1B
Manufacturer Part Number
SAM3S1B
Description
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
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23.13.2
Figure 23-29. Clock Rate Transition Occurs while the SMC is Performing a Write Operation
Figure 23-30. Recommended Procedure to Switch from Slow Clock Mode to Normal Mode or from Normal Mode to Slow
392
internal signal from PMC
Slow Clock Mode
internal signal from PMC
SAM3S
Switching from (to) Slow Clock Mode to (from) Normal Mode
Slow Clock Mode
Clock Mode
A[23:0]
NWE
MCK
NCS
This write cycle finishes with the slow clock mode set
A [23:0]
NWE
MCK
NCS
of parameters after the clock rate transition
When switching from slow clock mode to the normal mode, the current slow clock mode transfer
is completed at high clock rate, with the set of slow clock mode parameters.See
page
Figure 23-30
other.
SLOW CLOCK MODE WRITE
1
392. The external device may not be fast enough to support such timings.
SLOW CLOCK MODE WRITE
1
illustrates the recommended procedure to properly switch from one mode to the
1
NWE_CYCLE = 3
1
1
1
SLOW CLOCK MODE WRITE
1
IDLE STATE
Reload Configuration Wait State
transition is detected:
1
Slow clock mode
1
Reload Configuration
Wait State
2
NORMAL MODE WRITE
2
NWE_CYCLE = 7
NORMAL MODE WRITE
3
3
6500C–ATARM–8-Feb-11
2
Figure 23-29 on
2
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