Stratix GX Architecture
pin. The I/O standards supported by any particular bank determines
what standards are possible for an external clock output driven by the fast
PLL in that bank.
Table 4–20 shows the I/O standards supported by fast PLL input pins.
Table 4–20. Fast PLL Port Input Pin I/O Standards
Input
I/O Standard
INCLK
PLLENABLE
LVTTL
v
v
v
v
v
v
v
LVCMOS
2.5 V
1.8 V
1.5 V
3.3-V PCI
3.3-V PCI-X
LVPECL
v
v
v
v
v
3.3-V PCML
LVDS
HyperTransport technology
Differential HSTL
Differential SSTL
3.3-V GTL
v
v
v
v
v
v
v
v
v
v
v
v
3.3-V GTL+
1.5V HSTL class I
1.5V HSTL class II
SSTL-18 class I
SSTL-18 class II
SSTL-2 class I
SSTL-2 class II
SSTL-3 class I
SSTL-3 class II
AGP (1× and 2×)
CTT
Altera Corporation
February 2005
4–95
Stratix GX Device Handbook, Volume 1
ALTERA [ ALTERA CORPORATION ]
