Freescale just realeased a new version of the eratta (hardware bugs) document for the MPC5200. It was posted last week, and adds some pretty significant problems to the FEC Ethernet and IDE/ATA sections.
Specifically, I'm wonder if Eratta ID 485 may be the cause of some of the IDE issues we've been attributing to Bestcomm: "During the concurrent access of ATA DMA READ and PCI or LPC the ATA_ISOLATION signal can be incorrectly driven when ATA is paused." Unfortunately, their proposed workaround isn't appropriate for many cases. They suggest that you not use "ATA_ISOLATION" and connect the ATA device directly to the LP bus without any buffering. This could lead to serious bus integrity issues, especially if the ATA device is connected by a ribbon cable. Eric ------------------------------------ Eric Johnson, Electrical Engineer Advanced Communication Design 7901 12th Avenue South Bloomington, MN 55425 Ph: 952-854-4000 Fax: 952-854-5774
