SAM4S16C Atmel Corporation, SAM4S16C Datasheet - Page 292

• Manufacturer Part Number: SAM4S16C
• Manufacturer: Atmel Corporation

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

15.5.7
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SAM4S
SAM4S
Waveform Generation
on RTC_MR according to the difference measured between the reference time and those of
RTC_TIMR.
Up to 2 waveforms can be generated at a time from the RTC in order to take advantage of the
RTC inherent prescalers while the RTC is the only powered circuitry (low power mode of opera-
tion, backup mode) or in any active modes. Going into backup or low power operating modes
does not affect the waveform generation outputs.
Both outputs (RTCOUT0, RTCOUT1) can have a source driver selected among 7 possibilities.
RTCOUT0 and RTCOUT1 have independent source selection registers.
For each output:
The first selection choice sticks the associated output at 0. (This is the reset value and it can be
used at anytime to disable the waveform generation.)
Selection choices 1 to 4 respectively select 1Hz, 32Hz, 64Hz and 512Hz.
32Hz or 64Hz can drive, for example, a TN LCD backplane signal while 1Hz can be used to
drive a blinking character like “:” for basic time display (hour, minute) on TN LCDs.
Selection choice 5 provides a toggling signal when the RTC alarm is reached.
Selection choice 6 provides a copy of the alarm flag, so the associated output is set high (logical
1) when an alarm occurs and immediately cleared when software clears the alarm interrupt
source.
Selection choice 7 provides a 1Hz periodic high pulse of 15 µs duration that can be used to drive
external devices for power consumption reduction or any other purpose.
The PIO lines associated to RTCOUT0, RTCOUT1 are automatically selecting these waveforms
as soon as RTC_MR register fields OUT0 and OUT1 differ from 0.
11100A–ATARM–28-Oct-11
11100A–ATARM–28-Oct-11