Техническая Спецификация для Intel E3845 FH8065301487715
Модели
FH8065301487715
PCU – iLB – Real Time Clock (RTC)
Intel
®
Atom™ Processor E3800 Product Family
Datasheet
4543
36
PCU – iLB – Real Time Clock
(RTC)
The SoC contains a Motorola MC146818B-compatible real-time clock with 242 bytes of
battery-backed RAM. The real-time clock performs twos key functions—keeping track of
the time of day and storing system data, even when the system is powered down. The
RTC operates on a 32.768 kHz crystal and a 3.3 V battery.
battery-backed RAM. The real-time clock performs twos key functions—keeping track of
the time of day and storing system data, even when the system is powered down. The
RTC operates on a 32.768 kHz crystal and a 3.3 V battery.
The RTC supports two lockable memory ranges. By setting bits in the configuration
space, two 8-byte ranges can be locked to read and write accesses. This prevents
unauthorized reading of passwords or other system security information.
space, two 8-byte ranges can be locked to read and write accesses. This prevents
unauthorized reading of passwords or other system security information.
The RTC supports a date alarm that allows for scheduling a wake up event up to 30
days in advance.
days in advance.
36.1
Signal Descriptions
Please see
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)
•
Platform Power: The reference power plane.
•
Description: A brief explanation of the signal’s function
I
O
I
O
I
O
I
O
I
O
I
O
I
O
O
Platform Control Unit
UA
R
R
T
LPC
GPI
O
O
RTC
HP
E
E
T
82
59
59
AP
IC
IC
82
54
54
SMB
iLB
SP
I
I
PMC