Altera PHYLite Bedienungsanleitung PDF herunterladen (Seite 18)

<variation_name>.sdc

You can find the location of the <variation_name>.sdc file in the .qip, which is generated during the IP

generation. The <variation_name>.sdc allows the Fitter to optimize timing margins with timing driven

compilation and allows the TimeQuest timing analyzer to analyze the timing of your design.

The IP core uses <variation_name>.sdc for the following operations:

• Creating clocks on PLL inputs

• Creating generated clocks

• Calling derive_clock_uncertainty

• Creating set_output_delay and set_input_delay constraints to analyze the timing of the read and

write paths

<variation_name>_ip_parameters.tcl

The <variation_name>_ip_parameters.tcl file lists the Altera PHYLite for Parallel Interfaces IP core

parameters and is read by the <variation_name>.sdc.

<variation_name>_pin_map.tcl

The <variation_name>_pin_map.tcl is a TCL library of functions and procedures that

<variation_name>.sdc uses.

Timing Analysis

Table 10: Timing Analysis

This table lists the timing analysis performed in the I/O and FPGA for the Altera PHYLite for Parallel Interfaces

IP core.

Location Description

I/O The Altera PHYLite for Parallel Interfaces IP core generation creates the appropriate

generated clock settings for the read strobe on the read path and the write strobe of the write

path, according to their strobe type (singled-ended, complementary, or differential) and their

interface type (SDR or DDR) in the following format:

• Clock name for read strobe—<pin_name>_IN.

• Clock name for the write path—<pin_name> for positive strobe.

• Clock name for the write path—<pin_name>_neg for negative strobe.

The set_false_path, set_input_delay and set_output_delay constraints are also

generated to ensure proper timing analysis of the Altera PHYLite for Parallel Interfaces IP

core.

<variation_name>.sdc

ug_altera_phylite

2015.01.16

Altera Corporation

Altera PHYLite for Parallel Interfaces IP Core User Guide

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Altera PHYLite Bedienungsanleitung Seite 18