4–26
Chapter 4: DC and Switching Characteristics
I/O Timing Model
f
For more information about PowerPlay tools, refer to the PowerPlay Early Power
Estimator and PowerPlay Power Analyzer page and the PowerPlay Power Analysis chapter
in volume 3 of the Quartus II Handbook.
For typical ICC standby specifications, refer to Table 4–14 on page 4–14 .
I/O Timing Model
The DirectDrive technology and MultiTrack interconnect ensures predictable
performance, accurate simulation, and accurate timing analysis across all Arria GX
device densities and speed grades. This section describes and specifies the
performance of I/Os.
All specifications are representative of worst-case supply voltage and junction
temperature conditions.
1
The timing numbers listed in the tables of this section are extracted from the
Quartus II software version 7.1.
Preliminary, Correlated, and Final Timing
Timing models can have either preliminary, correlated, or final status. The Quartus II
software issues an informational message during design compilation if the timing
models are preliminary. Table 4–43 lists the status of the Arria GX device timing
models.
■
Preliminary status means the timing model is subject to change. Initially, timing
numbers are created using simulation results, process data, and other known
parameters. These tests are used to make the preliminary numbers as close to the
actual timing parameters as possible.
■
■
Correlated numbers are based on actual device operation and testing. These
numbers reflect the actual performance of the device under worst-case voltage and
junction temperature conditions.
Final timing numbers are based on complete correlation to actual devices and
addressing any minor deviations from the correlated timing model. When the
timing models are final, all or most of the Arria GX family devices have been
completely characterized and no further changes to the timing model are
expected.
Table 4–43. Arria GX Device Timing Model Status
Device
EP1AGX20
EP1AGX35
EP1AGX50
EP1AGX60
EP1AGX90
Preliminary
Correlated
Final
v
—
—
—
—
—
—
—
—
—
—
v
v
v
v
Arria GX Device Handbook, Volume 1
© December 2009 Altera Corporation
ALTERA [ ALTERA CORPORATION ]
