SPRUJ28E November 2021 – September 2024 AM68 , AM68A , TDA4AL-Q1 , TDA4VE-Q1 , TDA4VL-Q1
The Vendor Specific Capability signals of the PCIe core - F0_VSEC_INTERRUPT_OUT, F1_VSEC_INTERRUPT_OUT, F2_VSEC_INTERRUPT_OUT, F3_VSEC_INTERRUPT_OUT, F4_VSEC_INTERRUPT_OUT and F5_VSEC_INTERRUPT_OUT, are used to generate interrupts to the EP from the RP. The F0_VSEC_INTERRUPT_OUT represents the interrupt for the EP Physical Function 0, the F1_VSEC_INTERRUPT_OUT is the interrupt output for EP Physical Function 1 and so on. These signals are aggregated into the PCIE_DOWNSTREAM_PULSE interrupt to the local host.
The RP can write to the Vendor Specific Control registers (PCIE_CORE_PFn_I_VENDOR_SPECIFIC_CONTROL_REG) to assert these signals at the EP and this will trigger the PCIE_DOWNSTREAM_PULSE interrupt to the EP host.