Programmable Current Strength - Altera Cyclone V Device Handbook

5-30

Programmable Current Strength

Programmable Current Strength
You can use the programmable current strength to mitigate the effects of high signal attenuation that is
caused by a long transmission line or a legacy backplane.
Table 5-25: Programmable Current Strength Settings for Cyclone V Devices
The output buffer for each Cyclone V device I/O pin has a programmable current strength control for the I/O
standards listed in this table.
I/O Standard
3.3 V LVTTL
3.3 V LVCMOS
3.0 V LVTTL
3.0 V LVCMOS
2.5 V LVCMOS
1.8 V LVCMOS
1.5 V LVCMOS
1.2 V LVCMOS
SSTL-2 Class I
SSTL-2 Class II
SSTL-18 Class I
SSTL-18 Class II
SSTL-15 Class I
SSTL-15 Class II
1.8 V HSTL Class I
1.8 V HSTL Class II
1.5 V HSTL Class I
1.5 V HSTL Class II
1.2 V HSTL Class I
1.2 V HSTL Class II
Note: Altera recommends that you perform IBIS or SPICE simulations to determine the best current
strength setting for your specific application.
Related Information
Programmable IOE Features in Cyclone V Devices
Altera Corporation
I / I Current Strength Setting (mA)
OH OL
(Default setting in bold)
16, 8, 4
2
16, 12, 8, 4
16, 12, 8, 4
16, 12, 8, 4
12, 10, 8, 6, 4, 2
12, 10, 8, 6, 4, 2
8, 6, 4, 2
12, 10, 8
16
12, 10, 8, 6, 4
16
12, 10, 8, 6, 4
16
12, 10, 8, 6, 4
16
12, 10, 8, 6, 4
16
12, 10, 8, 6, 4
16
on page 5-29
Supported in HPS
(SoC Devices Only)
Yes (except 16 mA)
Yes
Yes
Yes
Yes
Yes
Yes
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—
Yes
Yes
Yes
Yes
—
—
Yes
Yes
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I/O Features in Cyclone V Devices
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CV-52005
2014.01.10