Stratix II and Stratix II GX I/O Standards Support
The PCI local bus specification is used for applications that interface to
the PCI local bus, which provides a processor-independent data path
between highly integrated peripheral controller components, peripheral
add-in boards, and processor/memory systems. The conventional PCI
specification revision 2.2 defines the PCI hardware environment
including the protocol, electrical, mechanical, and configuration
specifications for the PCI devices and expansion boards. This standard
requires 3.3-V VCCIO. Stratix II and Stratix II GX devices are fully
compliant with the 3.3-V PCI Local Bus Specification Revision 2.2 and
meet 64-bit/66-MHz operating frequency and timing requirements.
1
The 3.3-V PCI standard does not require input reference
voltages or board terminations. Stratix II and Stratix II GX
devices support both input and output levels.
3.3-V PCI-X
The 3.3-V PCI-X I/O standard is formulated under PCI-X Local Bus
Specification Revision 1.0a developed by the PCI SIG.
The PCI-X 1.0 standard is used for applications that interface to the PCI
local bus. The standard enables the design of systems and devices that
operate at clock speeds up to 133 MHz, or 1 Gbps for a 64-bit bus. The
PCI-X 1.0 protocol enhancements enable devices to operate much more
efficiently, providing more usable bandwidth at any clock frequency. By
using the PCI-X 1.0 standard, you can design devices to meet PCI-X 1.0
requirements and operate as conventional 33- and 66-MHz PCI devices
when installed in those systems. This standard requires 3.3-V VCCIO
.
Stratix II and Stratix II GX devices are fully compliant with the 3.3-V
PCI-X Specification Revision 1.0a and meet the 133-MHz operating
frequency and timing requirements. The 3.3-V PCI-X standard does not
require input reference voltages or board terminations.
1
Stratix II and Stratix II GX devices support both input and
output levels operation.
SSTL-2 Class I and SSTL-2 Class II
The 2.5-V SSTL-2 standard is formulated under JEDEC Standard,
JESD8-9A: Stub Series Terminated Logic for 2.5-V (SSTL_2).
The SSTL-2 I/O standard is a 2.5-V memory bus standard used for
applications such as high-speed DDR SDRAM interfaces. This standard
defines the input and output specifications for devices that operate in the
SSTL-2 logic switching range of 0.0 to 2.5 V. This standard improves
4–6
Stratix II Device Handbook, Volume 2
Altera Corporation
January 2008
ALTERA [ ALTERA CORPORATION ]
