IT8721F-BX – Ibex Peak platform cause S3 resume fail issue

IT8721F-BX Datasheet PDF learn more.

Part number : IT8721F-BX

Functions : This is a kind of semiconductor, Ibex Peak platform cause S3 resume fail issue.

Pin arrangement :

Package information :

Manufacturer : ELITEGROUP COMPUTER SYSTEMS

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IT8721F-BX Datasheet PDF

The texts in the PDF file :

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:/// 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:/// 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:/// 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 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 COMPUTER SYSTEMS CO., LTD. Date: 3/10/2011 Page: 5  Root cause : Power sequence between PCH core 1.05V and PWROK resume from S3 to S0 are failure.  Solution : PWROK output signal changed from pin 32 PWRGD1_30ms to [ … ]

IT8721F-BX PDF File



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