EP3C80 datasheet(124/274 Pages) ALTERA

124 / 274 page

7–2

Chapter 7: High-Speed Differential Interfaces in the Cyclone III Device Family

High-Speed I/O Interface

Cyclone III Device Handbook

December 2011

Altera Corporation

Volume 1

Figure 7–1 shows the I/O banks of the Cyclone III device family.

Figure 7–1. Cyclone III Device Family I/O Banks

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.

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 8

I/O Bank 7

I/O Bank 3

I/O Bank 4

I/O banks 7 and 8 also support the

HSTL-12 Class II I/O standard

I/O banks 3 and 4 also support the

HSTL-12 Class II I/O standard

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