PRIXP420ABD

The PRIXP420ABD is one member of the Intel® IXP420 family.It drives a logic 0 onto both the USB D+ and D- lines for the duration of the assertion of the PWRON_RST_N line, after which it tri-states the lines, and lets pull-ups and pull-downs in the system take effect. This errata does not apply to the Intel® IXC1100 Control Plane Processor A0 stepping.

PRIXP420ABD is possible that the PCI bus can get in a locked condition, when multiple products are connected in a system and these systems are using the DMA contr-ollers on the Intel® IXP42X Product Line of Network Processors and IXC1100 Control Plane Processor.

Up to three standard PCI transfers from device A are enqueued into the IXP42X processor's inbound transfer queue. However they are not de-queued from this inbound queue for execution in the IXP42X processor during the time one DMA 8-word PCI transfer (read or write) is pending completion on PCI bus. If Device A has not returned or accepted one DMA 8-word PCI transfer by the time Device A issues a fourth PCI transfer to the IXP42X processor, the proce-ssor will begin to retry this fourth inbound PCI transfer, as the PRIXP420ABD processor's inbound queue is now full.