AMD 34675C lxdb800 spec update free download

File name 34675C_lxdb800_spec_update.pdf

AMD GeodeTM LX DB800 Development Board Specification Update 1.0 Scope This document discusses known issues of the AMD Note: This is revision C of this document. The changes GeodeTM LX DB800 development board. The table below between revision B (dated January 2006) are in provides a summary of the issues. A detailed description of issue #3 and are non-technical. Minor rewording of each issue, its impact and a recommended resolution/fix the Description and Resolution. In the Resolution, follow. the application note that is referenced changed names. Now called "AMD GeodeTM CS5536 Com- panion Device USB 2.0 Device Linux Workaround" with publication ID remaining the same (40471). Table 1-1. Issues Summary Issue #(Note 1) Description 1 Limited High speed USB 2.0 functionality 2 Suspend-to-RAM non-functional 3 USB 2.0 high speed (HS) device defaults to full speed (FS) after wake from APM Suspend (S3) Note 1. Issue numbers may not be sequential since issues are omitted once they are resolved. 34675C - March 2006 - Confidential 1 Specification Update 34675C - March 2006 - Confidential 2.0 Issues 1) Limited high speed USB 2.0 functionality that when the system is put in the Suspend-to-RAM state it will not power off the ATX supply. Description: USB high speed data transfers may not complete. Resolution: The CS5536 signal WORK_AUX needs to be connected to the inverter at R67 that controls Implications: A signal integrity issue has been iden- the ATX power supply main rails. This change will tified with the USB 2.0 interface that affects all four cause the system to power up instantly when the ATX USB ports routed through the ETX connector X1. power supply is connected for the first time. Power There is coupling between the PCI AD bus and the