GTS AXI Streaming Intel® FPGA IP for PCI Express* User Guide

ID 813754
Date 8/07/2024
Public

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7.4. Configuration Intercept Interface

The Configuration Intercept Interface (CII) allows the application logic to detect the occurrence of a Configuration (CFG) request on the link and to modify the request. It follows the AXI-Stream interface protocol with a ready valid handshake and supports a maximum of one outstanding request at a time.

The GTS AXI Streaming IP provides CII monitoring capability. CII monitoring feature is used to monitor the configuration write cycle that happens with no intention to override the values being written. When the CII monitoring feature is enabled, only the Configuration Intercept Request Interface is exposed and not the Configuration Intercept Response Interface. The GTS AXI Streaming IP decodes the CII request received and outputs it on Configuration Intercept Request Interface if it is a write request. CII halt deassertion happens towards the HIP after the shadow registers operation is done, without depending on p0_app_ss_st_ciiresp_tvalid.