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Notes for Figure:
1. Refer to MSEL Settings for the correct resistor pull-up and pull-down values for all configuration schemes.
2. The synchronizers shown in all three figures can be internal if the host is an FPGA or CPLD. If the host is a microprocessor,
you must use discrete synchronizers.
Related Information
•
•
Intel Agilex Device Family Pin Connection Guidelines
3.1.6. Debugging Guidelines for the Avalon-ST Configuration Scheme
The Avalon-ST configuration scheme replaces the previously available in fast passive parallel (FPP) modes. This configuration
scheme retains similar functionality and performance. Here are the important differences:
•
The Avalon-ST configuration scheme requires you to monitor the flow control signal,
AVST_READY
. The
AVST_READY
signal indicates if the device can receive configuration data.
•
The
AVST_CLK
and
AVSTx8_CLK
clock signals cannot pause when configuration data is not being transferred. Data is not
transferred when
AVST_READY
and
AVST_VALID
are low. The
AVST_CLK
and
AVSTx8_CLK
clock signals must run
continuously until
CONF_DONE
asserts.
Debugging Suggestions
Review the general Configuration Debugging Checklist in the Debugging Guide chapter before considering these debugging
tips that pertain to the Avalon-ST configuration scheme.
•
Only assert
AVST_VALID
after the SDM asserts
AVST_READY
.
•
Only assert
AVST_VALID
when the
AVST_DATA
is valid.
•
Ensure that the
AVST_CLK
clock signal is continuous and free running until configuration completes. The
AVST_CLK
can
stop after
CONF_DONE
asserts. The initialization state does not require the
AVST_CLK
signal.
•
If using x8 mode, ensure that you use the dedicated
SDM_IO
pins for this interface (clock, data, valid and ready).
•
If using x16 or x32 mode, power the I/O bank containing the x16 or x32 pins (I/O Bank 3A) at 1.2 V.
•
Ensure you select the appropriate Avalon-ST configuration scheme in your Intel Quartus Prime Pro Edition project.
•
Ensure the
MSEL
pins reflect this mode on the PCB.
3. Intel Agilex Configuration Schemes
683673 | 2021.10.29
Intel
®
Agilex
™
Configuration User Guide
64