Datasheet

Real Time Clock (RTC)
Intel
®
Quark™ microcontroller D2000
Datasheet January 2016
370 Document Number: 333577-002EN
20 Real Time Clock (RTC)
The SoC contains a Real Time Clock for the purpose of keeping track of time. The RTC
operates from 1 Hz to 32.768 kHz.
The RTC supports alarm functionality that allows scheduling an Interrupt / Wake Event
for a future time.
The RTC operates in all SoC Power States. The RTC is powered from the same battery
supply as the rest of the SOC and does not have its own dedicated supply.
20.1 Signal Descriptions
Please see Chapter 2, “Physical Interfaces” for additional details.
The signal description table has the following headings:
• Signal Name: The name of the signal/pin
• Direction: The buffer direction can be either input, output, or I/O
(bidirectional)
• Type: The buffer type found in Chapter 4, “Electrical Characteristics”
• Description: A brief explanation of the signal’s function
Table 49. Memory Signals
Signal Name Direction/
Type
Description
OSC32_IN I
Analog
Crystal Input: This signal is connected to the
32.768 kHz Crystal.
OSC32_OUT O
Analog
Crystal Output: This signal is connected to the
32.768 kHz Crystal.
NOTE: Signal Names are preliminary and are subject to changes when the “Physical Interfaces”
Chapter is populated.
20.2 Features
The following is a list of the RTC features:
• Programmable 32 bit binary Counter
• Counter increments on successive edges of a Counter Clock from 1 Hz to
32.768 kHz (derived from the 32.768 kHz Crystal Oscillator clock)
• Comparator for Interrupt / Wake Event generation based on the programmed
Match Value
• Supports Interrupt / Wake Event generation when only the Counter Clock is
running (Fabric Clock is off)