SAM4S16C Atmel Corporation, SAM4S16C Datasheet - Page 19
Manufacturer Part Number
Specifications of SAM4S16C
# Of Touch Channels
Hardware Qtouch Acquisition
Max I/o Pins
Quadrature Decoder Channels
Sd / Emmc
Adc Resolution (bits)
Adc Speed (ksps)
Resistive Touch Screen
Dac Resolution (bits)
Self Program Memory
External Bus Interface
Temp. Range (deg C)
-40 to 85
I/o Supply Class
Operating Voltage (vcc)
1.62 to 3.6
Mpu / Mmu
Yes / No
Output Compare Channels
Input Capture Channels
Calibrated Rc Oscillator
Active mode is the normal running mode with the core clock running from the fast RC oscillator,
the main crystal oscillator or the PLLA. The power management controller can be used to adapt
the frequency and to disable the peripheral clocks.
The various low-power modes of the SAM4S are described below:
The purpose of backup mode is to achieve the lowest power consumption possible in a system
which is performing periodic wake-ups to perform tasks but not requiring fast startup time. Total
current consumption is 3 µA typical.
The Supply Controller, zero-power power-on reset, RTT, RTC, Backup registers and 32 kHz
oscillator (RC or crystal oscillator selected by software in the Supply Controller) are running. The
regulator and the core supply are off.
Backup mode is based on the Cortex-M4 deep sleep mode with the voltage regulator disabled.
The SAM4S can be awakened from this mode through WUP0-15 pins, the supply monitor (SM),
the RTT or RTC wake-up event.
Backup mode is entered by using WFE instructions with the SLEEPDEEP bit in the Cortex-M4
System Control Register set to 1. (See the Power management description in The ARM Cortex-
M4 Processor section of the product datasheet).
Exit from Backup mode happens if one of the following enable wake up events occurs:
• WKUPEN0-15 pins (level transition, configurable debouncing)
Note: The two diodes provide a “switchover circuit” (for illustration purpose)
between the backup battery and the main supply when the system is put in
External wakeup signal
ADC, DAC, Analog