EP1AGX ALTERA [Altera Corporation], EP1AGX Datasheet - Page 103

• Manufacturer Part Number: EP1AGX
• Description: Section I. Arria GX Device Data Sheet
• Manufacturer: ALTERA [Altera Corporation]

Chapter 2: Arria GX Architecture
I/O Structure
MultiVolt I/O Interface
Table 2–27. Arria GX MultiVolt I/O Support
© December 2009 Altera Corporation
Notes to
(1) To drive inputs higher than V
(2) The pin current may be slightly higher than the default value. You must verify that the driving device’s V
(3) Although V
(4) Arria GX devices support 1.2-V HSTL. They do not support 1.2-V LVTTL and 1.2-V LVCMOS.
V
CCIO
1.2
1.5
1.8
2.5
3.3
overdrive input buffer option in the Quartus II software.
not violate the applicable Arria GX V
with the Arria GX device if it has inputs that tolerate the V
(V)
Table
f
f
CC I O
2–27:
1.2
(4)
(4)
(4)
(4)
(4)
specifies the voltage necessary for the Arria GX device to drive out, a receiving device powered at a different level can still interface
On-Chip Series Termination (R
Arria GX devices support driver impedance matching to provide the I/O driver with
controlled output impedance that closely matches the impedance of the transmission
line. As a result, reflections can be significantly reduced. Arria GX devices support
R
matching impedance is selected, current drive strength is no longer selectable.
Table 2–26
For more information about R
Selectable I/O Standards in Arria GX Devices
For more information about tolerance specifications for OCT without calibration, refer
to the
The Arria GX architecture supports the MultiVolt I/O interface feature that allows
Arria GX devices in all packages to interface with systems of different supply
voltages. Arria GX VCCINT pins must always be connected to a 1.2-V power supply.
With a 1.2-V V
VCCIO pins can be connected to either a 1.2-, 1.5-, 1.8-, 2.5-, or 3.3-V power supply,
depending on the output requirements. The output levels are compatible with
systems of the same voltage as the power supply (for example, when VCCIO pins are
connected to a 1.5-V power supply, the output levels are compatible with 1.5-V
systems). Arria GX VCCPD power pins must be connected to a 3.3-V power supply.
These power pins are used to supply the pre-driver power to the output buffers,
which increases the performance of the output pins. The VCCPD pins also power
configuration input pins and JTAG input pins.
Table 2–27
v
S
OCT for single-ended I/O standards with typical R
1.5
v
v
—
—
C C IO
(2)
DC & Switching Characteristics
Input Signal (V)
but less than 4.0 V, disable the PCI clamping diode and select the Allow LVTTL and LVCMOS input levels to
I L
v
shows the list of output standards that support R
lists Arria GX MultiVolt I/O support.
maximum and V
1.8
v
v
—
—
(2)
CCINT
v
v
v
level, input pins are 1.2-, 1.5-, 1.8-, 2.5-, and 3.3-V tolerant. The
(Note 1)
2.5
v
v
(2)
(2)
(2)
I H
C C I O
minimum voltage specifications.
value.
v
v
v
S
3.3
v
v
S
OCT supported by Arria GX devices, refer to the
OCT)
(2)
(2)
(2)
chapter.
v
v
v
v
v
1.2
(4)
(3)
(3)
(3)
(3)
chapter.
v
v
v
1.5
v
—
(3)
(3)
(3)
S
values of 25 and 50 Once
v
v
Output Signal (V)
1.8
O L
—
—
v
(3)
(3)
Arria GX Device Handbook, Volume 1
maximum and V
S
OCT.
v
2.5
—
—
—
v
(3)
O H
minimum voltages do
3.3
v
—
—
—
—
2–97
5.0
v
—
—
—
—