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AR# 22246

LogiCORE SPI-4.2 (POS-PHY L4) v7.3 - SnkFFBurstErr is asserted unexpectedly

Description

Urgency: Hot  

 

General Description: 

When using the SPI-4.2 Core targeting Virtex-4 (v7.0, v7.1. v7.2, v7.3), I receive a false SnkFFBurstErr. Additionally, prior to SnkFFBurstErr assertion, the following four signals might all be asserted at the same time for one to two clock cycles: 

 

SnkFFAlmostEmpty_n 

SnkFFEmpty_n 

SnkAlmostFull_n 

SnkOverFlow_n 

 

This issue is dependent on burst size, data traffic pattern, and user clock frequency and phase relationship. Although this issue might not surface in functional simulation, it can occur in hardware and must be addressed by installing a patch.

Solution

This problem is fixed in the SPI4.2 v7.3 patch. 

 

For more information, see (Xilinx Answer 22238).

AR# 22246
Date Created 09/04/2007
Last Updated 05/19/2014
Status Archive
Type General Article