EP3C16F256I7N Altera, EP3C16F256I7N Datasheet - Page 103

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

Chapter 6: I/O Features in the Cyclone III Device Family
I/O Element Features
© December 2009
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Altera Corporation
For more information about programmable current strength, refer to the
Editor
Table 6–1
These programmable current strength settings are a valuable tool in helping decrease
the effects of simultaneously switching outputs (SSO) in conjunction with reducing
system noise. The supported settings ensure that the device driver meets the
specifications for IOH and IOL of the corresponding I/O standard.
When you use programmable current strength, on-chip series termination is not
available.
Table 6–1. Programmable Current Strength
For information about how to interface the Cyclone III device family with 3.3-, 3.0-, or
2.5-V systems, refer to the guidelines provided in
Devices with 3.3/3.0/2.5-V LVTTL/LVCMOS I/O
1.2-V LVCMOS
1.5-V LVCMOS
1.8-V LVTTL/LVCMOS
2.5-V LVTTL/LVCMOS
3.0-V LVCMOS
3.0-V LVTTL
3.3-V LVCMOS
3.3-V LVTTL
HSTL-12 Class I
HSTL-12 Class II
HSTL-15 Class I
HSTL-15 Class II
HSTL-18 Class I
HSTL-18 Class II
SSTL-18 Class I
SSTL-18 Class II
SSTL-2 Class I
SSTL-2 Class II
BLVDS
Notes to
(1) The default setting in the Quartus II software is 50-Ω OCT without calibration for all non-voltage reference and
(2) The default current setting in the Quartus II software is highlighted in bold italic for 3.3-V LVTTL and 3.3-V LVCMOS
HSTL/SSTL Class I I/O standards. The default setting is 25-Ω OCT without calibration for HSTL/SSTL Class II I/O
standards.
I/O standards.
chapter in volume 2 of the Quartus II Handbook.
Table
I/O Standard
lists the possible settings for I/O standards with current strength control.
(2)
6–1:
(2)
Top and Bottom I/O Pins
2, 4, 6, 8, 10, 12,16
2, 4, 6, 8, 10, 12,16
2, 4, 6, 8, 10,12
4, 8, 12,16
4, 8, 12,16
4, 8, 12,16
8, 10, 12
8, 10, 12
8, 10, 12
8, 12, 16
8, 10,12
(Note 1)
12, 16
8, 12
4, 8
14
16
16
16
I
2
O H
/I
OL
Systems.
Current Strength Setting (mA)
AN 447: Interfacing Cyclone III
Cyclone III Device Handbook, Volume 1
Left and Right I/O Pins
2, 4, 6, 8, 10, 12,16
2, 4, 6, 8, 10, 12,16
2, 4, 6, 8,10
4, 8, 12,16
4, 8, 12,16
4, 8, 12,16
8, 10, 12
8, 10, 12
8, 10, 12
8, 12, 16
12, 16
8, 10
8, 12
4, 8
—
16
16
16
2
Assignment
6–3