AT91RM3400-DK Atmel, AT91RM3400-DK Datasheet - Page 165
AT91RM3400-DK
Manufacturer Part Number
AT91RM3400-DK
Description
KIT DEV FOR AT91RM3400
Manufacturer
Atmel
Series
AT91SAM Smart ARMr
Type
MCUr
Datasheets
1.AT91RM3400-DK.pdf
(461 pages)
2.AT91RM3400-DK.pdf
(2 pages)
3.AT91RM3400-DK.pdf
(25 pages)
Specifications of AT91RM3400-DK
Contents
Evaluation Board, Software and Documentation
Processor To Be Evaluated
AT91RM3400
Data Bus Width
32 bit
Interface Type
RS-232, USB
For Use With/related Products
AT91RM3400
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
- Current page: 165 of 461
- Download datasheet (6Mb)
Real Time Clock (RTC)
Overview
Block Diagram
Figure 52. RTC Block Diagram
Product
Dependencies
Power
Management
Interrupt
1790A–ATARM–11/03
Crystal Oscillator: 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 for-
mat 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.
Important features of the RTC include:
•
•
•
•
•
•
The Real-time Clock is continuously clocked at 32768 Hz. The Power Management Controller
has no effect on RTC behavior.
The RTC Interrupt is connected to interrupt source 1 (IRQ1) of the advanced interrupt control-
ler. This interrupt line is due to the OR-wiring of the system peripheral interrupt lines (System
Timer, Real Time Clock, Power Management Controller, Memory Controller, etc.). When a
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
AT91RM3400
RTC Interrupt
165
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