Intel C2550 FH8065401488912 Data Sheet
Product codes
FH8065401488912
Volume 3—Signal Electrical and Timing Characteristics—C2000 Product Family
DDR3 Memory Interface
Intel
®
Atom™ Processor C2000 Product Family for Microserver
Datasheet, Vol. 3 of 3
September 2014
640
Order Number: 330061-002US
33.1.4.2
Overshoot/Undershoot Pulse Duration
Pulse duration describes the total amount of time that an overshoot/undershoot event
exceeds the overshoot/undershoot reference voltage. The total time could encompass
several oscillations above the reference voltage. Multiple overshoot/undershoot pulses
within a single overshoot/undershoot event may need to be measured to determine the
total pulse duration.
Note:
Oscillations below the reference voltage cannot be subtracted from the total overshoot/
undershoot pulse duration.
Notes:
1.
Values are measured at the SoC component pin/ball.
2.
VDDQ is a SoC voltage supply group. See
.
3.
T
CH
Min is the minimum value specified for CLK High Time T
CH
Table 33-4. DDR3 I/O Overshoot and Undershoot Specifications
Parameter
Symbol
Max
Units
Fig
Notes
Overshoot Voltage
V
OSHOOT
1.2
*
VDDQ
V
1, 2
Overshoot Duration
T
OSHOOT
0.2
*
T
CH
Min
ns
1, 3
Undershoot Voltage
V
USHOOT
0.1
*
VDDQ
V
1, 2
Undershoot Duration
T
USHOOT
0.2
*
T
CH
Min
ns
1, 3
Figure 33-5. Maximum Acceptable Overshoot/Undershoot Diagram
V
OSHOOT
V
USHOOT
V
SS
T
OSHOOT
T
USHOOT