IT8721F-DX

ELITEGROUP COMPUTER SYSTEMS CO., LTD. Date: 3/10/2011 Page: 1 SIO IT8721F-BX/DX in Ibex Peak platform cause S3 resume fail issue Issue Topic: Technical Issue Survey Form Prepared by: RD Department: FISH BUI/ODM1 Doc.: ECS Technical Issue Survey Form V.A Free Datasheet http://www.datasheet4u.com/ ELITEGROUP COMPUTER SYSTEMS CO., LTD. Date: 3/10/2011 Page: 2 Document Version History: Reversion V.A Draft Change List Release Date 1/08/2009 Doc.: ECS Technical Issue Survey Form V.A Free Datasheet http://www.datasheet4u.com/ ELITEGROUP COMPUTER SYSTEMS CO., LTD. Date: 3/10/2011 Page: 3 1. Technical Issue Survey Priority/Schedule Priority Target Schedule □ Urgent 2010/1/25 ■ High □ Low Note: A). Urgent: To finish the survey and solution implementation within one or two days. B). High: To finish the survey and solution implementation within one week. C). Low: To finish the survey within two or three weeks for reference. 2. Technical Issue Description  System will power shutdown when resume from S3 state, refer to below measurement of comparison with the perspective signals PCH circuit core 1.05V and SIO PWROK in failure state: 1)PCH core 1.05V circuit: 2)SIO PWROK connect to pin 32 PWRGD1_30ms : Doc.: ECS Technical Issue Survey Form V.A Free Datasheet http://www.datasheet4u.com/ ELITEGROUP COMPUTER SYSTEMS CO., LTD. Date: 3/10/2011 Page: 4 3)Below waveform demonstrate fail state of PWROK is ready 28 ms after PCH core 1.05V active:  Below timing diagram of IBX...