Equation 1–1, Equation 1–2 – Altera Early SSN Estimator User Manual
Page 7
Chapter 1: Early SSN Estimator
1–3
Setting up the Early SSN Estimator
© November 2009
Altera Corporation
Early SSN Estimator User Guide for Altera Programmable Devices
Equation 1–1. Victim Net Driven Low
V
IL margin
(K)
=
V
IL margin (K)
= Signal Margin Low when K aggressors are switching simultaneously
K = Number of I/Os switching simultaneously
QLN
(K)
= Quiet Low Noise when K aggressors are switching simultaneously
QL = Quiet Low Voltage (No aggressors switching)
V
IL Max (DC)
= Receiver Maximum DC Input Low Voltage
Equation 1–2. Victim Net Driven High
V
IH margin
(K)
=
V
IH margin (K)
= Signal Margin High when K aggressors are switching simultaneously
K = Number of I/Os switching simultaneously
QHN
(K)
= Quiet High Noise when K aggressors are switching simultaneously
QH = Quiet High Voltage (No aggressors switching)
V
IH Min (DC)
= Receiver Minimum DC Input High Voltage
{1
QLN
K
( )
QL
–
(
)
VIL
M ax DC
(
)
QL
–
(
)
--------------------------------------------------
} *100 where
–
{1
Q H
Q HN
–
K
( )
(
)
Q H
VIH
–
Min DC
(
)
(
)
-------------------------------------------------- } *100 where
–