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AR# 17764

LogiCORE SPI-4.2 (POS-PHY L4) v6.0 - Warning messages appear when NGDBuild is run with an SPI-4.2 core

Description

General Description:

When I implement an SPI-4.2 design through NGDBuild, several "WARNING" messages appear.

The following sections discuss the various warning messages.

Solution

When an SPI-4.2 Core is used in Dynamic Alignment mode, the following warning messages may appear in your NGDBuild report (design_name.bld). Single or multiple instances of these messages may occur:

1. "WARNING:XdmHelpers:793 - The TNM "RDClk_P" drives the CLKIN pin of DCM "pl4_snk_top0/pl4_snk_clk0/DynamicAlignV2.rdclk_dcm0". This TNM cannot be traced through the DCM because it is not used in exactly one PERIOD specification. This TNM is used in the following user groups and/or specifications:

TS_RDClk_P=PERIOD RDClk_P 472.000000 MHz HIGH 50.000000%

TS_RD_IO=FROM RDClk_P TO RDClkDiv_Except_RAM TS_RDClk_P*1.000000

2. "WARNING:NgdBuild:483 - Attribute "TIG" on "del" is on the wrong type of object. Please see the Constraints Guide for more information on this attribute."

3. "WARNING:NgdBuild:454 - logical net 'pl4_src_top0/SrcStatCh(0)' has no load."

4. "WARNING:NgdBuild:483 - Attribute "LOC" on "pl4_snk_top0/pl4_snk_io0/DynamicAlign.pbd/dc/ce_1_0" is on the wrong type of object. Please see the Constraints Guide for more information on this attribute."

5. "WARNING:NgdBuild:483 - Attribute "RLOC" on "pl4_snk_top0/pl4_snk_io0/DynamicAlign.pbd/dc/lk.12.ld/lk.3.l_1" is on the wrong type of object. Please see the Constraints Guide for more information on this attribute."

Warnings #4 and #5, which involve "LOC" and "RLOC" attributes in the DynamincAlign module, may be safely ignored. These warnings occur because of the directed routing and floorplanning of the module.

In the Loopback Design example, a number of the SPI-4.2 outputs are not utilized, which causes warning #3.

Warning messages #1 and #2 appeared during the verification, are known to be harmless, and may be safely ignored.

When an SPI-4.2 Core is used in Static Alignment mode, the following warning messages may appear in your NGDBuild report (design_name.bld). Single or multiple instances of these messages may occur:

1. "WARNING:NgdBuild:454 - logical net 'PhaseAlignRequest_c' has no load."

2. "WARNING:NgdBuild:454 - logical net 'pl4_src_top0/SrcStatCh(3)' has no load."

In Static Alignment mode, the "PhaseAlignRequest" signal is not used, which causes warning message #1. Warning message #2 occurs because certain signals are not utilized in the Loopback Design Example.

AR# 17764
Date Created 09/03/2007
Last Updated 12/15/2012
Status Active
Type General Article