Debugging Guidelines For The Avalon-St Configuration Scheme - Intel Agilex Configuration User Manual

3. Intel Agilex Configuration Schemes
UG-20205 | 2019.04.03
Notes for Figure:
1. Refer to MSEL Settings for the correct resistor pull-up and pull-down values for all configuration schemes.
2. The
pins are dual-purpose. After power-on, you can reassign these pins to other functions. For more information,
MSEL
refer to Enabling Dual Purpose Pins
3. 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
MSEL Settings on page 27

3.1.5. 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,
signal indicates if the device can receive configuration data.
•
The
AVST_CLK
transferred when
continuously until
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
•
Only assert
AVST_VALID
•
Ensure that the
stop after
CONF_DONE
• If using x8 mode, ensure that you use the dedicated
• If using x16 or x32 mode, power the I/O bank containing the x16 or x32 pins (I/O Bank 3A) at 1.8 V.
Send Feedback
and clock signals cannot pause when configuration data is not being transferred. Data is not
AVSTx8_CLK
and
AVST_READY AVST_VALID
asserts.
CONF_DONE
after the SDM asserts
when the
AVST_DATA
clock signal is continuous and free running until configuration completes. The
AVST_CLK
asserts. The initialization state does not require the
are low. The and
AVST_CLK AVSTx8_CLK
.
AVST_READY
is valid.
AVST_CLK
pins for this interface (clock, data, valid and ready).
SDM_IO
. The
AVST_READY AVST_READY
clock signals must run
AVST_CLK
signal.
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