EP80579 Datasheet, PDF (1878/1916 Pages) Intel Corporation – Intel® EP80579 Integrated Processor Product Line

Intel^® EP80579 Integrated Processor
Table 49-63. RTC DC Clock Input Characteristics (RTCX[2:1])
Symbol
Parameter
V_IL
Input voltage low
V_IH
Input voltage high
C_L
RTCX1 typical value
C_L
RTCX2 typical value
Notes:
1.
3.3 V Clock Input
2.
Guaranteed by design.
Min
-
0.40
Typical
-
-
6
6
Max
0.10
1.2
49.5.12.3 RTC AC Characteristics
Units
V
V
pf
pf
Table 49-64. RTC Clock Input (RTCX[2:1])Timing Values
Symbol
Parameter
Min
Nominal
Max
Units Notes
RTCX[2:1] RTC clock frequency
32.768
KHz
Tolerance
This parameter specifies the crystal
tolerance for RTCX[2:1]
-20
-
+20
ppm
Notes:
1.
RTCX[1] can be connected to a crystal along with RTCX[2] or to an oscillator
2.
When using an oscillator only RTCX[1] is connected and RTCX[2] can remain unconnected.
1, 2
Table 49-65. RTC Clock Output (SUSCLK) Timings
Parameters
Min
Operating Frequency
-
Duty Cycle
30
High Time
10
Low Time
10
Notes:
1.
SUSCLK is the RTC generator output
Typical
32.768
-
-
-
Max
-
70
-
-
Units
kHz
%
us
us
Figure
-
49-33
49-33
Note
1
Figure 49-33.RTC Clock Output (SUSCLK) Timing Diagram
High Time
2.0V
0.8V
Fall Time
Period
Low Time
Rise Time
Intel^® EP80579 Integrated Processor Product Line Datasheet
1878
August 2009
Order Number: 320066-003US