The Endpoint model consists of these blocks:
• PCI Express Endpoint (the core in Endpoint configuration) model.
• PIO slave design, consisting of:
° PIO_RX_ENGINE
° PIO_TX_ENGINE
° PIO_EP_MEM
° PIO_TO_CTRL
The PIO_RX_ENGINE and PIO_TX_ENGINE blocks interface with the ep block for reception and transmission of TLPs from/to the Root Port Design Under Test (DUT). The Root Port DUT consists of the core configured as a Root Port and the Configurator Example Design, which consists of a Configurator block and a PIO Master design, or customer design.
The PIO slave design is described in detail in Programmed Input/Output: Endpoint Example Design .