EP3C16F256I7N Altera, EP3C16F256I7N Datasheet - Page 113

• Manufacturer Part Number: EP3C16F256I7N
• Description: Cyclone III
• Manufacturer: Altera

Chapter 6: I/O Features in the Cyclone III Device Family
Termination Scheme for I/O Standards
Table 6–4. Cyclone III Device Family Supported I/O Standards and Constraints (Part 2 of 2)
Termination Scheme for I/O Standards
Voltage-Referenced I/O Standard Termination
© December 2009
RSDS and
mini-LVDS
BLVDS
LVPECL
Notes to
(1) The PCI-clamp diode must be enabled for 3.3-V/3.0-V LVTTL/LVCMOS.
(2) Differential HSTL and SSTL outputs use two single-ended outputs with the second output programmed as inverted. Differential HSTL and SSTL
(3) PPDS, mini-LVDS, and RSDS are only supported on output pins.
(4) LVPECL is only supported on clock inputs.
(5) Bus LVDS (BLVDS) output uses two single-ended outputs with the second output programmed as inverted. BLVDS input uses LVDS input buffer.
(6) Class I and Class II refer to output termination and do not apply to input. 1.2-V HSTL input is supported at both column and row I/O regardless of
(7) True differential LVDS, RSDS, and mini-LVDS I/O standards are supported in left and right I/O pins while emulated differential LVDS, RSDS, and
I/O Standard
inputs treat differential inputs as two single-ended HSTL and SSTL inputs and only decode one of them. Differential HSTL and SSTL are only
supported on CLK pins.
class.
mini-LVDS I/O standards are supported in both left and right, and top and bottom I/O pins.
(5)
Table
(4)
(3)
6–4:
Altera Corporation
Differential
Differential
Differential
The Cyclone III device family supports PCI and PCI-X I/O standards at 3.0-V V
The 3.0-V PCI and PCI-X I/O are fully compatible for direct interfacing with 3.3-V PCI
systems without requiring any additional components. The 3.0-V PCI and PCI-X
outputs meet the V
sufficient noise margin.
This section describes recommended termination schemes for voltage-referenced and
differential I/O standards.
The 3.3-V LVTTL, 3.0-V LVTTL and LVCMOS, 2.5-V LVTTL and LVCMOS, 1.8-V
LVTTL and LVCMOS, 1.5-V LVCMOS, 1.2-V LVCMOS, 3.0-V PCI, and PCI-X
I/O standards do not specify a recommended termination scheme per the JEDEC
standard
Voltage-referenced I/O standards require an input reference voltage (V
termination voltage (V
termination voltage of the transmitting device, as shown in
Type
Standard
Support
—
—
—
IH
and V
TT
). The reference voltage of the receiving device tracks the
IL
Input
requirements of 3.3-V PCI and PCI-X inputs with
2.5
2.5
V
—
C CIO
Level (in V)
Output
2.5
2.5
—
CLK,
DQS
Top and Bottom I/O Pins
—
—
v
PLL_OUT
Cyclone III Device Handbook, Volume 1
v
—
—
Figure 6–6
User
Pins
I/O
v
v
—
and
REF
) and a
Figure
CLK,
Left and Right
DQS
v
—
—
I/O Pins
CCIO
User I/O
6–7.
6–13
.
Pins
v
v
—