Intel Agilex, Configuration User Manual, Page: 40 / 196

Note:
Device configuration may fail under the following conditions when you select the
OSC_CLK_1
as the clock source for
configuration:
•
You fail to drive the
OSC_CLK_1
pin.
•
You drive the
OSC_CLK_1
pin at an incorrect frequency. Select one of the following input reference clock frequencies to
drive the
OSC_CLK_1
pin:
— 25 MHz
— 100 MHz
— 125 MHz
The Intel Agilex device multiplies the
OSC_CLK_1
source clock frequency to generate a 250 MHz clock for configuration. Using
an
OSC_CLK_1
source enables the fastest possible configuration. Refer to Setting Configuration Clock Source for instructions
setting this frequency using the Intel Quartus Prime Software.
You can also specify this frequency by editing your
.qsf
file. Here are the possible assignments:
# EXTERNAL OSCILLATOR CLOCK VIA OSC_CLK_1 PIN
set_global_assignment -name DEVICE_INITIALIZATION_CLOCK OSC_CLK_1_25MHZ
set_global_assignment -name DEVICE_INITIALIZATION_CLOCK OSC_CLK_1_100MHZ
set_global_assignment -name DEVICE_INITIALIZATION_CLOCK OSC_CLK_1_125MHZ
Related Information
Setting Configuration Clock Source
on page 38
2. Intel Agilex Configuration Details
UG-20205 | 2019.10.09
Intel
®
Agilex
™
Configuration User Guide
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