Type: Answers

Area: Documentation, Intellectual Property


Last Modified: December 18, 2018
Version Found: v18.0
Bug ID: FB: 1806677554;

When using the Intel® Stratix® 10 Avalon -MM Interface for PCI Express* IP Core, how can I read the PCIe* VENDOR ID register at address offset 0x000?

Description

The address offset given for the PCI* Header Configuration Space Registers in the user guide is only a partial 12 Least Significant Bit (LSB) address offset(4 Kbytes PCIe configuration space). When using the optional Hard IP Reconfiguration block signals the full 21 bit hip_reconfig_address[20:0] must be driven.

 

Workaround/Fix

This clarification will be added to a future release of the user guide.

To access Device Identification Registers, such as VENDOR ID etc., the MSB bit of hip_reconfig_address bus must be set to 1'b1.   

#NOTE: Attempted access of undefined address space have unpredictable results and can cause the PCIe* Hard IP core to stop working, a power cycle is required to recover.