Programmable Output Slew Rate Control; Programmable Ioe Delay; Programmable Open-Drain Output - Intel Agilex User Manual

2. Intel Agilex I/O Features and Usage
UG-20214 | 2019.04.02
Configuration Pin
Function
AVST_VALID
AVST_DATA

2.2.1. Programmable Output Slew Rate Control

Each I/O pin contains a slew rate control, allowing you to specify the slew rate on a
pin-by-pin basis. The slew rate control affects both the rising and falling edges of the
signal.
You can select between three slew rate settings: Fast, Medium, and Slow.
• The Fast slew rate provides high-speed transitions for high-performance systems.
This is the default setting.
• The Slow slew rate reduces system noise and crosstalk but adds a nominal delay
to the rising and falling edges.
• Enable the DQS DLL in the same lane when you use a medium or slow slew rate
for voltage referenced I/O standards

2.2.2. Programmable IOE Delay

You can activate the programmable IOE delays to ensure zero hold time, minimize
setup time, or increase clock-to-output time. This feature helps read and write timing
margins because it minimizes the uncertainties between signals in the bus.
Each pin can have a different input delay from pin-to-input register or a delay from
output register-to-output pin values. This is to ensure that the signals within a bus
have the same delay going into or out of the device.
For more information about the programmable IOE delay specifications, refer to the
device data sheet.
Related Information
Intel Agilex Data Sheet

2.2.3. Programmable Open-Drain Output

Intel Agilex devices support open drain output on 1.2 V LVCMOS I/O standard. The
programmable open-drain output provides a high-impedance state on output when
logic to the output buffer is high. If logic to the output buffer is low, output is low.
(2)
Slow slew rate signal
Send Feedback
Location Direction
SDM Input 1.2 V LVCMOS
Shared
GPIO bank
SDM Input 1.2 V LVCMOS
Shared
GPIO bank
I/O Standard Drive
Strength
(mA)
without
calibration
® ™
Intel Agilex General Purpose I/O and LVDS SERDES User Guide
Weak Pull-Up/Pull-
Down
(
2)
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