Intel C2518 FH8065501516710 Data Sheet

Intel

®

 Atom™ Processor C2000 Product Family for Microserver

September 2014

Datasheet, Vol. 2 of 3

Order Number: 330061-002US

521

The signal description table has the following headings:

• Signal Name: The name of the signal/pin
• Direction: The buffer direction is either input, output, or I/O (bi-directional)
• Type: The buffer type
• Description: A brief explanation of the signal function

I

: Connects to the 32.768-kHz crystal.

O

: Connects to the 32.768-kHz crystal.

O

Connects to an external 0.1-µF capacitor on the platform board to Vss.

I

delay is in the 10-20 ms range.
Cleanly clearing the PMC registers allows the Intel

®

 Trusted Platform 

Module firmware to detect when the PMC registers have been reset due 

to battery removal/re-installation. This signal is in the RTC power well.

Unless CMOS is being cleared (only to be done in the G3 power 

state), the signal input must always be high when all other 

RTC power planes are on.

I

I

 Active-low signal. An external RC circuit creates a 

time delay for the signal such that it goes high sometime after the 

battery voltage is valid. The RC time delay must be in the 10-20 ms 

range. This allows the SoC to detect when a new battery has been 

installed. This signal is internally asserted after the suspend power is 

up if the coin cell battery is weak.
When active, this signal also resets some bits in the RTC well that are 

This signal may also be used for debug purposes, as part of an 

XDP port.

I