SAM4S16C Atmel Corporation, SAM4S16C Datasheet - Page 76

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SAM4S16C

Manufacturer Part Number
SAM4S16C
Description
Manufacturer
Atmel Corporation
Datasheets

Specifications of SAM4S16C

Flash (kbytes)
1024 Kbytes
Pin Count
100
# Of Touch Channels
32
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
11.5.2.2
11.5.2.3
11.5.3
76
76
SAM4S
SAM4S
Power Management Programming Hints
Wakeup from WFE
External Event Input
The processor wakes up if:
In addition, if the SEVONPEND bit in the SCR is set to 1, any new pending interrupt triggers an
event and wakes up the processor, even if the interrupt is disabled or has insufficient priority to
cause an exception entry. For more information about the SCR, see
The processor provides an external event input signal. Peripherals can drive this signal, either to
wake the processor from WFE, or to set the internal WFE event register to 1 to indicate that the
processor must not enter sleep mode on a later WFE instruction. See
information.
ISO/IEC C cannot directly generate the WFI and WFE instructions. The CMSIS provides the fol-
lowing functions for these instructions:
• it detects an exception with sufficient priority to cause an exception entry
• it detects an external event signal. See
• in a multiprocessor system, another processor in the system executes an SEV instruction.
void __WFE(void) // Wait for Event
void __WFE(void) // Wait for Interrupt
“External Event Input”
“System Control Register”
“Wait For Event”
11100A–ATARM–28-Oct-11
11100A–ATARM–28-Oct-11
for more
.

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