4–38
Altera Corporation
Stratix Device Handbook, Volume 2
June 2006
Power Source of Various I/O Standards
Power Source of
Various I/O
Standards
For Stratix and Stratix GX devices, the I/O standards are powered by
different power sources. To determine which source powers the input
buffers, see Table 4–13. All output buffers are powered by VCCIO. Quartus II
Software
Support
You specify which programmable I/O standards to use for Stratix and
Stratix GX devices with the Quartus II software. This section describes
Quartus II implementation, placement, and assignment guidelines,
including
■
Compiler Settings
■
Device & Pin Options
■
Assign Pins
■
Programmable Drive Strength Settings
■
I/O Banks in the Floorplan View
■
Auto Placement & Verification
Compiler Settings
You make Compiler settings in the Compiler Settings dialog box
(Processing menu). Click the Chips & Devices tab to specify the device
family, specific device, package, pin count, and speed grade to use for
your design.
Table 4–13. The Relationships Between Various I/O Standards and the
Power Sources
I/O Standard
Power Source
2.5V/3.3V LVTTL
VCCIO
PCI/PCI-X 1.0
VCCIO
AGP
VCCIO
1.5V/1.8V
VCCIO
GTL
VCCINT
GTL+
VCCINT
SSTL
VCCINT
HSTL
VCCINT
CTT
VCCINT
LVDS
VCCINT
LVPECL
VCCINT
PCML
VCCINT
HyperTransport
VCCINT