Altera PowerPlay Early Power Estimator - Manual (Page 62)

3–44 Altera Corporation
PowerPlay Early Power Estimator For Stratix II, Stratix II GX & HardCopy II January 2007
Power Analysis
of the PowerPlay Early Power Estimator. The total I
CCXCVR
current is the
supply current required from all the transceiver-specific power rails:
V
CCT
, V
C C H
,V
CCR
,V
CCA
, V
CCP
, and V
CCL
. For estimates of I
CCXCVR
based on
power rails, refer to “Transceiver (XCVR)” on page 3–33 .
Figure 3–31 shows the power supply current estimation. I
CCINT
, I
CCPD
,
I
CCIO
and I
CCXCVR
are displayed.
Figure 3–31. Power Supply Current in the PowerPlay Early Power Estimator
Table 3–14 describes the parameters in the Power Supply Current
parameters of the PowerPlay Early Power Estimator.
Table 3–14. Power Supply Current Information
Column Heading Description
I
CCINT
This shows the total current drawn from the I
CCINT
supply (in A).
I
CCPD
This shows the total current drawn from the pre-drive (I
CCPD
) supply (in A).
I
CCIO
This shows the total current drawn from the I
CCIO
power rail(s). See the I/O sheet for
details on the current drawn from each I/O rail.
I
C C I O
includes any current drawn through the I/O into off-chip termination resistors.
This can result in I
C C
IO values that are higher than the reported I/O thermal power,
since this off-chip current is dissipated as heat elsewhere and does not factor into the
calculation of device temperature.
I
CCXCVR
This shows the total current drawn from the I
CCXCVR
rail(s). See the XCVR sheet for
details on the current drawn from each XCVR rail.