Specifications

Programmable IOE Features in Cyclone V Devices
Table 5-24: Summary of Supported Cyclone V Programmable IOE Features and Settings
Supported in HPS I/O
(SoC FPGA Devices Only)
ConditionSetting (Default
setting in bold)
Feature
YesDisabled if you use
the R
S
OCT feature.
0 (Slow), 1 (Fast)Slew Rate Control
——Refer to the device
datasheet
I/O Delay
Yes—On, OffOpen-Drain Output
YesDisabled if you use
the weak pull-up
resistor feature.
On, OffBus-Hold
YesDisabled if you use
the bus-hold feature.
On, OffWeak Pull-up Resistor
—For LVDS I/O
standard only. Not
supported for
differential HSTL and
SSTL I/O standards.
0 (enabled) and 1
(disabled)
Pre-Emphasis
——00 (low), 01
(medium), 10 (high)
Differential Output Voltage
YesRecommended to
turn on for 3.3 V I/O
standards
On, OffOn-Chip Clamp Diode
The on-chip clamp diode is available on all general purpose I/O (GPIO) pins in all Cyclone V device
variants.
Note:
Related Information
• Cyclone V Device Datasheet
• Programmable Current Strength on page 5-29
• Programmable Output Slew-Rate Control on page 5-30
• Programmable IOE Delay on page 5-30
• Programmable Output Buffer Delay on page 5-30
• Programmable Pre-Emphasis on page 5-31
• Programmable Differential Output Voltage on page 5-31
I/O Features in Cyclone V Devices
Altera Corporation
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CV-52005
Programmable IOE Features in Cyclone V Devices
5-28
2013.06.21