Intel® Celeron® Processor for PGA370 up to 1.40 GHz on 0.13 µ Process
Figure 20. Maximum Acceptable AGTL Overshoot/Undershoot Waveform
Time dependent Overshoot
0.1 ns
0.3 ns
1.78 V Max
1 ns
1.62 V
1.47 V
1.32 V
Vos_ref
c
a
b
a
b
c
Vss
-0.15 V
-0.30 V
-0.46 V Min
0.1 ns
0.3 ns
1 ns
Time dependent Undershoot
3.3
Non-AGTL Signal Quality Specifications and Measurement
Guidelines
There are three signal quality parameters defined for non-AGTL signals: overshoot/undershoot,
ringback, and settling limit. All three signal quality parameters are shown in Figure 21 for the non-
AGTL signal group.
Figure 21. Non-AGTL Overshoot/Undershoot, Settling Limit, and Ringback 1
Settling Limit
Overshoot
V
HI
Rising-Edge
Ringback
Falling-Edge
Ringback
Settling Limit
V
LO
V
SS
Time
Undershoot
NOTE:
1. VHI = 1.80 V for all non-AGTL signals except for BCLK, PICCLK, and PWRGOOD. VHI =2.0 V for PICCLK,
and VHI =1.8 V for PWRGOOD. BCLK and PICCLK signal quality is detailed in Section 3.1.
Datasheet
47
INTEL [ INTEL ]
