The Avst_Ready Signal - Intel Agilex Configuration User Manual

3. Intel Agilex Configuration Schemes
UG-20205 | 2019.10.09

3.1.3. The AVST_READY Signal

Before beginning configuration, trigger device cleaning by toggling the
transition also returns the device to the configuration state.
Figure 12. Monitoring the AVST_READY Signal and Responding to Backpressure
The configuration files for Intel Agilex devices can be highly compressed. During configuration, the decompression of the bit
stream inside the device requires the host to pause before sending more data. The Intel Agilex device asserts the
signal when the device is ready to accept data. The
AVST_READY
high. In addition, the host must handle backpressure by monitoring the
signal any time after the assertion of
configuration.
Note: For Avalon-ST x16 and x32, after Power-On-Reset you must not send data to the device until it indicates it is ready using
. You must drive
nSTATUS
to go high. The device can starting sending data when
nSTATUS
Send Feedback
AVST_CLK
AVSTx8_READY
or AVST_READY
AVSTx8_VALID
or AVST_VALID
AVSTx8_DATA[7:0
AVST_DATA[15:0]
data0 data1 data2 data3
AVST_data[31:0]]
signal. The host must monitor the
AVST_READY
low and wait for
nCONFIG
pin from high to low to high. This
nCONFIG
must send no more
than 6 valid clocks after
ready goes low
signal is only valid when the
AVST_READY
AVST_READY
to go low. Next, you should drive
nSTATUS
asserts.
AVST_READY
nCONFIG
nSTATUS
signal and may assert
AVST_VALID
signal throughout the
AVST_READY
high and wait for
nCONFIG
Intel ® Agilex ™ Configuration User Guide
pin is
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