Техническая Спецификация для Intel C2550 FH8065401488912
Модели
FH8065401488912
Intel
®
Atom™ Processor C2000 Product Family for Microserver
September 2014
Datasheet, Vol. 2 of 3
Order Number: 330061-002US
521
Volume 2—Real Time Clock (RTC)—C2000 Product Family
Signal Descriptions
26.1
Signal Descriptions
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
• 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
Table 26-2. Signals
Name
Type
Direction
Description
These signals are in the RTC Power Well
I
Crystal Input 1
: Connects to the 32.768-kHz crystal.
O
Crystal Input 2
: Connects to the 32.768-kHz crystal.
O
Connects to an external 0.1-µF capacitor on the platform board to Vss.
I
RTC Reset:
delay is in the 10-20 ms range.
Cleanly clearing the PMC registers allows the Intel
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.
Note:
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.
Note:
I
Resume Well Reset:
I
RTC Battery Test:
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
When active, this signal also resets some bits in the RTC well that are
Note:
This signal may also be used for debug purposes, as part of an
XDP port.
I