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- 2. What is S3/S4? And what’s the benefit? S3/S4 power system and control sequence? How to implement
- 3. What is S3/S4 ?? S3,S4在ACPI的定义: S3—Suspend to Ram (STR): The system context is maintained in system
- 4. What is S3/S4 ?? ACPI: 1996 年时,由微软(Microsoft)、英特尔(Intel)与东芝(Toshiba)主导,共同制定了业界以「操作系统」为标准的电源管理程序ACPI(Advanced Configuration & Power Interface),正式把电源管理工作交给操作系统来负责. S3,S4在ACPI的定义: S4—Suspend to Disk (STD):
- 5. ACPI Power Management Spec. Sleeping State Definitions: Sleeping states are types of sleeping state within global
- 6. 1. Global System State Definitions---G state 2. Device Power State Definitions---D state 3. Sleeping State Definitions---S
- 7. What’s the benefit of S3/S4?? S3-STR(Suspend to RAM,休眠到内存) 優點:启动速度特别快,而且可以保留工作状态,同時此模式的耗电最少,速度也够快,达到最省电和无噪音的效果. 缺點:因數據保存于內存,系統不能完全斷電且很容易因为第三方驱动程序的兼容性问题使得系统无法正常进入Suspend状态.同時BIOS对ACPI的支持不完善,也会使STR功能无法使用。 S4-STD(Suspend to Disk,休眠到硬盤) 優點:启动速度較系統開機快且可以保留工作状态,同時此模式不耗電,速度也較快, 在系統完全掉電後不會丟失任何信息. 缺點:數據保存于HDD,在進入休眠狀態時需要保存桌面及所有打開文件和文檔的映像至HDD,相比S3待機速度較慢.
- 8. S3/S4 Power system and control sequence
- 9. Control Signals
- 10. Power on sequence
- 11. Power off sequence
- 12. Power system architecture 1 Tahoe power system architecture : PWM MAX8731 Charger P-MOS 4407 P-MOS 4433
- 13. Q1. Why we need to separate the powers to AUX,S5,S3,S0 ? Q2. How to control them
- 14. PM_SLP_S4# signal is used to turn on S3 power . PM_SLP_S3# signal is used to turn
- 15. PM_SLP_S3# signal is used to turn on 5V、3D3V、1D8V_S0 also . Circuit operation S0 power : Power
- 16. Stand-by动作原理 S3 Entry process: When user issue S3 event (Fn+Fx ,power button, LID switch), BIOS will
- 17. Standby(S0 S3)實現動作原理: Standby動作原理 S0?S3 S3?S0 S3 S0 power sequence
- 18. 1. 當系統接到Hibernation指令後會將當前文檔,桌面,工作狀態等數據映像寫入HDD內並更改HDD引導區. 2. 所有數據都寫入HDD後系統會依照power off sequence將各reset power依此關掉進入完全關機狀態. 3. S4喚醒時完全follow power on sequence各power reset會依次打開,CPU正常運作後開始讀取HDD內邏輯引導區引導讀取映像文件,系統恢復到之前狀態. Standby(S0 S4)實現動作原理: Hibernation動作原理
- 19. Standby VS Hibernation Contrast between Standby and Hibernation power
- 20. How to implement S3?? Check SW whether support ACPI spec. Check MRS( Marketing Requirement Spec.) support
- 21. How to implement S3?? Wake Event Design: USB: If your system support USB S3 wake,you must
- 22. How to implement S3?? Discrete VGA support D3hot or D3cold: D3cold:When system enter S3 state, all
- 23. How to Debug S3?? Step 1: check HW S0 power off sequence. And DIMM whether enter
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