Презентация на тему Wistron Corporation

system and control sequence?
How to implement S3/S4??
How to debug

S3??

Agenda

system context is maintained in system DRAM, but power

is shut off to no-critical circuits. Memory is retained, and refreshes continue. All clocks stop except RTC clock.

to Disk (STD):
The system context is maintained on
the

disk. All power is then shut off
to the system except for the logic required to resume.

types of sleeping state within global sleeping state, G1

State Definitions---D state
3. Sleeping State Definitions---S state
4. Processor Power

State Definitions---C state
5. Device and Processor Performance State Definition---P state

ACPI定义了以下几种状态规范：


ACPI 电源管理标准把操作系统、硬件环境、省电作用等，分成五种状态做规划，分别是G（Global）系统状态、D（Device）装置状态、S（Sleeping）休眠状态，C（CPU）处理器状态以及P（Performance）state.

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.

Power
S3 Power
S0 Power


PWM
MAX8770

VCC_CORE_S0
1D05V_S0
1
4
3
2
1
6
6
5
7
6
4
7
7
5
1D2V_LAN_S5
5V_S3
N-MOS
4468
1D8V_S0
LDO
APL5915

to AUX,S5,S3,S0 ?
Q2. How to control them ?
The answer

showed as below :

AUX
Power

S5
Power

S3
Power

S0
Power

BAT only

AD+

or

AUX_S5

3D3V_S5
5V_S5

DCBATOUT

AC_IN

PM_SLP_S4#

PM_SLP_S3#

1D8V_S3

5V_S0
3D3V_S0
1D8V_S0
1D05V_S0
VCC_Core

For power button use

For stand_by
mode use

For normal mode use

For power button &
wake on LAN use

3 Power sequence and control：

Power system architecture

power .
PM_SLP_S3# signal is used to turn on S0

power.

Power sequence

also .
Circuit operation S0 power :




Power sequence

,power button, LID switch), BIOS will issue to OS,then

OS will notice all driver to execute S3 process. After OS finish standby process . BIOS will enable SWI. Then BIOS notice chipset to turn off S0 power.( keep S3 power alive).
S3 Resume process:
When Wake Event be issued, KBC will issue SWI to south bridge or south bridge get PME# from PCI device or south bridge get PWRBT# from power button, then south bridge will issue SLP_S3# to turn on S0 power again. Then BIOS will restore OS data from DIMM, then back to OS working mode.

S0 power sequence

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

spec.
Check MRS( Marketing Requirement Spec.) support what kind of

S3 wake event.
-Power button,LID,BL2
-USB, WOR,WOL, Any-key wake
-LAN, Card-Bus,IEEE 1394 (PCI PME#)
Check VGA support D3hot or D3cold
Check South Bridge Wake Up Interface
Check KBC Wake Up interface
Check Logic Gate design

system support USB S3 wake,you must provide 5V_S3

for USB power. And BIOS need to enable USB interface S3
wake event.
WOR: If your system support Wake on Ring. You must support S3
power for pin17 of MDC connector. And Vendor’s driver need to
support wake up function.
PCI Device Wake( LAN, Card-Bus, 1394): If your system support PCI
device wake event, you must provide S3 power to AUX power pin
of device. And connect PME# to south bridge’s PME#.

D3cold:
D3cold:When system enter S3 state, all power of VGA

will be turn off. But you need to check VGA driver can be supported or not.
D3hot: When system enter S3 state, some graphic power is still alive. It means that S3 power leakage will be increased.

South Bridge Wake Up Interface:
1. Power Button( AUX power plane)
2. SWI from KBC( S5 power plane)
3. PME#, need pull high to S5 power plane or not( S3 or S5 power plane)
4. AC_IN ( S5 power plane)
5. Other S5 power plane’s GPIO, need to check their pull high power state.

power off sequence. And DIMM whether enter self-refresh mode

normally.
Step 2: check S5/S3 power is alive, and no leakage in S0 power( 3D3V_S0,5V_S0,..)
Step 3: check KBC or South bridge receive your wake signal.
Step 4: check south bridge or KBC already send out power on signal.
Step 5: check power on sequence. And DIMM’s timing from self-refresh mode to normal refresh mode.
Step 6: Check BIOS resume debug code,already entire process.
Step 7: Check system whether back to OS working mode.
Step 8: Load current chipset register setting to compare with old setting.