7–2
Chapter 7: High-Speed Differential Interfaces in the Cyclone III Device Family
High-Speed I/O Interface
Figure 7–1 shows the I/O banks of the Cyclone III device family.
Figure 7–1. Cyclone III Device Family I/O Banks
I/O banks 7 and 8 also support the
HSTL-12 Class II I/O standard
I/O Bank 8
I/O Bank 7
All I/O Banks Support:
3.3-V LVTTL/LVCMOS
3.0-V LVTTL/LVCMOS
2.5-V LVTTL/LVCMOS
1.8-V LVTTL/LVCMOS
1.5-V LVCMOS
1.2-V LVCMOS
3.0-V PCI/PCI-X (1)
LVDS
RSDS (2)
BLVDS (5)
mini-LVDS (2)
PPDS (2)
LVPECL (3)
SSTL-2 Class I and II
SSTL-18 Class I and II
HSTL-18 Class I and II
HSTL-15 Class I and II
HSTL-12 Class I
Differential SSTL-2 (4)
Differential SSTL-18 (4)
Differential HSTL-18 (4)
DIfferential HSTL-15 (4)
Differential HSTL-12 (4)
I/O Bank 3
I/O Bank 4
I/O banks 3 and 4 also support the
HSTL-12 Class II I/O standard
Notes to Figure 7–1:
(1) The PCI-X I/O standard does not meet the IV curve requirement at the linear region.
(2) The RSDS, mini-LVDS, and PPDS I/O standards are only supported on output pins. These I/O standards are not supported on input pins.
(3) The LVPECL I/O standard is only supported on dedicated clock input pins. This I/O standard is not supported on output pins.
(4) The differential SSTL-2, SSTL-18, HSTL-18, HSTL-15, and HSTL-12 I/O standards are only supported on dedicated clock input pins and PLL
output clock pins. PLL output clock pins do not support Class II interface type of differential SSTL-18, HSTL-18, HSTL-15, and HSTL-12 I/O
standards.
(5) BLVDS output uses two single-ended outputs with the second output programmed as inverted. BLVDS input uses LVDS input buffer.
Cyclone III Device Handbook
Volume 1
December 2011 Altera Corporation
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