6–12
Chapter 6: I/O Features in the Cyclone III Device Family
I/O Standards
Table 6–4 lists I/O standards supported by the Cyclone III device family and which
I/O pins support them.
Table 6–4. Cyclone III Device Family Supported I/O Standards and Constraints (Part 1 of 2)
Left and Right
I/O Pins
V
CCIO Level (in V)
Top and Bottom I/O Pins
Standard
Support
I/O Standard
Type
User
CLK,
CLK, UserI/O
Input
Output
PLL_OUT
I/O
DQS
v
v
v
v
DQS
v
v
v
v
Pins
Pins
3.3-V LVTTL,
3.3-V LVCMOS
3.3/3.0/2.5
Single-ended
Single-ended
Single-ended
JESD8-B
JESD8-B
JESD8-5
3.3
3.0
2.5
1.8
v
v
v
v
v
v
v
v
v
(1)
(2)
3.0-V LVTTL,
3.0-V LVCMOS
3.3/3.0/2.5
v
(1)
(2)
2.5-V LVTTL /
LVCMOS
3.3/3.0/2.5
v
(2)
1.8-V LVTTL /
LVCMOS
Single-ended
Single-ended
JESD8-7
1.8/1.5 (2)
v
1.5-V LVCMOS
1.2-V LVCMOS
JESD8-11
1.8/1.5 (2)
1.2
1.5
1.2
v
v
v
v
v
v
v
v
v
v
Single-ended JESD8-12A
SSTL-2 Class I,
SSTL-2 Class II
Voltage
JESD8-9A
referenced
2.5
1.8
1.8
1.5
1.2
1.2
2.5
1.8
1.8
1.5
1.2
1.2
v
v
v
v
v
v
v
v
v
v
v
v
v
v
v
v
v
v
v
v
v
v
v
—
v
v
v
v
v
—
SSTL-18 Class I,
SSTL-18 Class II
Voltage
JESD815
referenced
HSTL-18 Class I,
HSTL-18 Class II
Voltage
JESD8-6
referenced
HSTL-15 Class I,
HSTL-15 Class II
Voltage
JESD8-6
referenced
Voltage
HSTL-12 Class I
JESD8-16A
referenced
Voltage
(7)
HSTL-12 Class II
PCI and PCI-X
JESD8-16A
referenced
Single-ended
—
3.0
—
3.0
2.5
—
v
—
v
—
v
v
—
v
—
v
—
v
—
v
—
v
v
—
—
—
v
—
v
—
v
—
—
—
Differential SSTL-2
Class I or Class II
Differential
JESD8-9A
(3)
2.5
—
Differential
SSTL-18 Class I or
Class II
1.8
Differential
JESD815
JESD8-6
JESD8-6
(3)
1.8
—
—
1.8
—
v
—
v
—
v
—
v
—
—
—
—
—
—
—
—
v
v
—
v
—
v
—
v
—
—
—
—
—
—
—
—
v
Differential
HSTL-18 Class I or
Class II
Differential
(3)
1.8
—
Differential
HSTL-15 Class I or
Class II
1.5
—
Differential
(3)
1.5
—
Differential
HSTL-12 Class I or
Class II
1.2
—
Differential
JESD8-16A
—
(3)
1.2
—
(4)
PPDS
Differential
2.5
Cyclone III Device Handbook
Volume 1
July 2012 Altera Corporation
ALTERA [ ALTERA CORPORATION ]
