SAM4S16C Atmel Corporation, SAM4S16C Datasheet - Page 287

• 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. Real-time Clock (RTC)
15.1
15.2
15.3
Figure 15-1. RTC Block Diagram
11100A–ATARM–28-Oct-11
11100A–ATARM–28-Oct-11
Description
Embedded Characteristics
Block Diagram
Slow Clock: SLCK
APB
The Real-time Clock (RTC) peripheral is designed for very low power consumption.
It combines a complete time-of-day clock with alarm and a two-hundred-year Gregorian or Per-
sian calendar, complemented by a programmable periodic interrupt. The alarm and calendar
registers are accessed by a 32-bit data bus.
The time and calendar values are coded in binary-coded decimal (BCD) format. The time format
can be 24-hour mode or 12-hour mode with an AM/PM indicator.
Updating time and calendar fields and configuring the alarm fields are performed by a parallel
capture on the 32-bit data bus. An entry control is performed to avoid loading registers with
incompatible BCD format data or with an incompatible date according to the current
month/year/century.
A clock divider calibration circuitry enables to compensate crystal oscillator frequency
inaccuracy.
An RTC output can be programmed to generate several waveforms, including a prescaled clock
derived from 32.768 KHz.
• Low Power Consumption
• Full Asynchronous Design
• Two Hundred Year Gregorian or Persian Calendar
• Programmable Periodic Interrupt
• Time, Date and Alarm 32-bit Parallel Load
• Crystal Oscillator Clock Calibration
• Waveform Generation
Clock Calibration
32768 Divider
User Interface
Control
Entry
Time
Alarm
Date
Interrupt
Control
Generator
Wave
RTCOUT0
RTCOUT1
RTC Interrupt
SAM4S
SAM4S
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