Stratix GX Architecture
Table 4–27. Stratix GX Supported I/O Standards (Part 2 of 2)
Input Reference
Board
Output Supply
Termination
Voltage (VTT)
(V)
Voltage (VREF
)
Voltage (VCCIO
)
I/O Standard
Type
(V)
(V)
SSTL-3 class I and II
AGP (1× and 2×)
CTT
Voltage-referenced
Voltage-referenced
Voltage-referenced
1.5
1.32
1.5
3.3
3.3
3.3
1.5
N/A
1.5
Notes to Table 4–27:
(1) This I/O standard is only available on input and output clock pins.
(2) This I/O standard is only available on output column clock pins.
f
For more information on I/O standards supported by Stratix GX
devices, see the Selectable I/O Standards in Stratix & Stratix GX Devices
chapter of the Stratix GX Device Handbook, Volume 2.
Stratix GX devices contain eight I/O banks in addition to the four
enhanced PLL external clock out banks, as shown in Figure 4–69. The four
I/O banks on the right and left of the device contain circuitry to support
high-speed differential I/O for LVDS, LVPECL, 3.3-V PCML, and
HyperTransport inputs and outputs. These banks support all I/O
standards listed in Table 4–27 except PCI I/O pins or PCI-X 1.0, GTL,
SSTL-18 Class II, and HSTL Class II outputs. The top and bottom I/O
banks support all single-ended I/O standards. Additionally, Stratix GX
devices support four enhanced PLL external clock output banks,
allowing clock output capabilities such as differential support for SSTL
and HSTL. Table 4–28 shows I/O standard support for each I/O bank.
Altera Corporation
February 2005
4–115
Stratix GX Device Handbook, Volume 1
ALTERA [ ALTERA CORPORATION ]
