ADSP-214xx SHARC Processor Hardware Reference 18-7
Real-Time Clock—ADSP-2147x
Operating Modes
The following sections provide information on the operating modes avail-
able to the real-time clock.
Alarm
The RTC provides two alarm features, programmed with the RTC alarm
register (RTC_ALARM). The first is a time of day alarm (hour, minute, and
second). When the alarm interrupt is enabled, the RTC generates an inter-
rupt each day at the time specified. The second alarm feature allows the
application to specify a day as well as a time. When the day alarm
Figure 18-2. Functional Partitioning
RTC CORE VOLTAGE
RTC CONTROL
INTERRUPT CONTROL
Interrupts and Status
Shadow Registers,
Read/Write Logic
LEVEL SHIFTER
I/O TO CORE
ALARM
COUNTER
OSCILLATOR 0
OSCILLATOR 1
POWER
SWITCHING
CIRCUITRY
I/O PADS
DM/PM BUS
RTC I/O VOLTAGE
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