March 25, 2004
This advisory is to inform the users of the Designer software version 5.1 and prior versions that when creating designs containing both QCLK Buf and QCLK Int macros for the A54SX72A and RT54SX72S devices, functional time zero failures may result. These failures are immediate; any designs that have passed initial functional test do not have these problems.
Symptoms and Effects:
When the design contains the QCLK Buf and QCLK Int macros (including QCLKBIBUF, QCLKBIBUFI, QCLKBUF, QCLKBUFI, QCLKINT, and QCLKINTI) from Designer v5.1 and prior versions, it is possible to observe time zero functional failures on the device.
The possible failure modes, as a result of incorrectly configured silicon macros by the Designer software v5.1 and prior versions, include:
- No clock signal on the clock network, or,
- An incorrect (clock signal expected to drive another quadrant) clock signal on the network. These failures are immediate; any designs that have passed initial functional test do not have these problems.
Description of Problem:
Within the A54SX72A and RT54SX72S devices, there are four muxes that determine if the QCLK network within a quadrant is driven by an external signal (using the QCLK Buf macro) or by an internal signal (using the QCLK Int macro). Investigation has shown that under certain conditions, these muxs are not configured correctly by the Designer software v5.1 and prior versions, resulting in the wrong clock being used to drive the QCLK network.
This issue has been resolved in Designer version 5.2. Any AFM file generated from Designer v5.2 or newer versions will not have this issue. However, the Designer v5.2 (and newer versions) software will not automatically inform the users if an existing design has this issue. If the user has an existing design and suspects a problem, please regenerate the AFM programming file with Designer v5.2 or newer versions. It is not necessary to re-run place-and-route. The Designer version 5.2 software is now available for download on Actel website (http://www.actel.com/). If any user suspects his design has this issue and/or is unable to upgrade to Designer v5.2, please contact Actel technical support at 1-800-262-1060 or email@example.com.
Part Numbers of Relevant Devices:
The device part numbers that are affected by the Designer software version 5.1 and prior versions include all combinations of packages (PQ208, FG256, FG484, CQ208, CQ256, CG624), speed grades (-F, Std, -1, -2, -3), temperature ranges (Commercial, Industrial, Mil-Temp), and screening levels (Commercial, Industrial, Mil-Temp, class B and E-flow) for the A54SX72A an RT54SX72S devices. The following list includes only the SMD devices part numbers and their equivalent Actel part numbers that are affected by the Designer software version 5.1 and prior versions.
Device Family Device Name DSCC SMD A54SX72A A54SX72A-CQ256B 5962-0054301QXC A54SX72A-1CQ256B 5962-0054302QXC A54SX72A-CQ208B 5962-0054301QYC A54SX72A-1CQ208B 5962-0054302QYC RT54SX72S RT54SX72S-CQ256B 5962-0151501QXC RT54SX72S-1CQ256B 5962-0151502QXC RT54SX72S-CQ208B 5962-0151501QYC RT54SX72S-1CQ208B 5962-0151502QYC RT54SX72S-CQ256E 5962-0151503QXC RT54SX72S-1CQ256E 5962-0151504QXC RT54SX72S-CQ208E 5962-0151503QYC RT54SX72S-1CQ208E 5962-0151504QYC
Contacts for Additional Questions:
For users with additional questions, please contact the Actel hotline (1-800-262-1060) or your regional FAE for assistance.
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