6919 - Nexus / PCIe: How to determine the total DW of TLP to be received by link[LINK]_rx_data_o?
6919 - Nexus / PCIe: How to determine the total DW of TLP to be received by link[LINK]_rx_data_o?
Description:
Referring to the TLP fields of the PCI-Express Base Specification (https://pcisig.com/specifications), the ‘Fmt’ will determine the desired format of TLP.
The PCI Express Link Layer Quad for all CertusPro-NX devices has four PIPE interfaces that can be used in different number of links. This can provide the maximum flexibility, depending on the bandwidth of the application requirements. The PCIe link ...
Solution: 1. Defining the usr_lmmi_offset_i [16:2] a. usr_lmmi_offset_i [16] == selects between Link Layer or PHY register access b. usr_lmmi_offset [15:2] == refer to FPGA-IPUG-02126 à word aligned offset of base + offset address 2. Write “1’b0” on ...
clk_usr_o originates from the PCIe Core, bypassing the PCIe Soft IP. It serves as an output to an external pin. Additionally, there are two input clocks for the Soft IP: clk_usr_i at 250 MHz and clk_usr_div2_i at 125 MHz.
Description: There are some parameters that cannot be configured using LMMI. Example, in these 2 parameters: a) Target Link Speed – this is possible. The LMMI write needs to happen before PHY out of reset b) Use TLP Interface – this is not possible ...