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IT8721F-BX Datasheet Ibex Peak Platform Cause S3 Resume Fail Issue

Manufacturer: ELITEGROUP COMPUTER SYSTEMS

Overview: ELITEGROUP PUTER 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://../ ELITEGROUP PUTER 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://../ ELITEGROUP PUTER 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.

General Description

 System will power shutdown when resume from S3 state, refer to below measurement of parison 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://../ ELITEGROUP PUTER 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 EDS demonstrate power sequence from S3 to S0, the relation between PCH core 1.05V and PWROK are described when PCH core 1.05V is ready minima 10ms after PWROK active.

Doc.: ECS Technical Issue Survey Form V.A Free Datasheet http://../ ELITEGROUP PUTER SYSTEMS CO., LTD.

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IT8721F-DX Ibex Peak platform cause S3 resume fail issue

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