PIO File Structure - 4.4 English

UltraScale Devices Gen3 Integrated Block for PCI Express LogiCORE IP Product Guide (PG156)

Document ID

PG156

Release Date

2023-11-24

Version

4.4 English

Table: PIO Design File Structure defines the PIO design file structure. Based on the specific core targeted, not all files delivered by the Vivado IP catalog are necessary, and some files might not be delivered. The major difference is that some of the Endpoint for PCIe solutions use a 32-bit user datapath, others use a 64-bit datapath, and the PIO design works with both. The width of the datapath depends on the specific core being targeted.

Table 5-2: PIO Design File Structure
File	Description
PIO.v	Top-level design wrapper
PIO_INTR_CTRL.v	PIO interrupt controller
PIO_EP.v	PIO application module
PIO_TO_CTRL.v	PIO turn-off controller module
PIO_RX_ENGINE.v	32-bit Receive engine
PIO_TX_ENGINE.v	32-bit Transmit engine
PIO_EP_MEM_ACCESS.v	Endpoint memory access module
PIO_EP_MEM.v	Endpoint memory

Three configurations of the PIO design are provided: PIO_64, PIO_128, and PIO_256 with 64-, 128-, and 256-bit AXI4-Stream interfaces, respectively. The PIO configuration that is generated depends on the selected Endpoint type (that is, UltraScale™ device integrated block, PIPE, PCI Express, and Block Plus) as well as the number of PCI Express lanes and the interface width selected. Table: PIO Configuration identifies the PIO configuration generated based on your selection.

Table 5-3: PIO Configuration
Core	x1	x2	x4	x8
Integrated Block for PCIe	PIO_64	PIO_64, PIO_128	PIO_64, PIO_128, PIO_256	PIO_64, PIO_128 ⁽¹⁾ , PIO_256
Notes: 1. The core does not support 128-bit x8 8.0 Gb/s configuration and 500 MHz user clock frequency.

This Figure shows the various components of the PIO design, which is separated into four main parts: the TX Engine, RX Engine, Memory Access Controller, and Power Management Turn-Off Controller.

Figure 5-4: PIO Design Components
X-Ref Target - Figure 5-4