SAM3N0B Atmel Corporation, SAM3N0B Datasheet - Page 229

• Manufacturer Part Number: SAM3N0B
• Manufacturer: Atmel Corporation

14. Real Time Clock (RTC)
14.1
14.2
14.3
Figure 14-1. RTC Block Diagram
11011A–ATARM–04-Oct-10
Description
Embedded Characteristics
Block Diagram
Slow Clock: SLCK
Bus Interface
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 calen-
dar, 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.
• Low Power Consumption
• Full asynchronous design
• Two hundred year calendar
• Programmable Periodic Interrupt
• Alarm and update parallel load
• Control of alarm and update Time/Calendar Data In
32768 Divider
Bus Interface
Control
Entry
Time
Interrupt
Control
Date
RTC Interrupt
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