Are there any known issues with USB Host on the ColdFire MCF5475 or MCF5485?
The M548x product line no longer supports USB Host via the Philips PCI part, however, the M547x product line still supports USB Host.
The original specification for the Philips ISP1561 allowed for a maximum of 33Mhz PCICLK. Anything slower was considered ok. Our MCF548x products set the PCICLK to 25Mhz and that was used to qualify the product. We had success early on, however, we started seeing the ISP1561 lock up under various operating systems, so we worked with Philips to get it resolved. They considered it a silicon bug and published an updated errata stating the part is limited to 31-33Mhz PCICLK with no fix planned. Any other frequencies may cause lockup. LogicPD has defeatured the MCF548x product line by removing the ISP1561 due to the silicon issue.
Please see PCN 321, Description of Change #3: http://www.logicpd.com/downloads/694/