Resume reset active表 示所有的standby power 都OK.
RSMRST#
AUXOK Logic Example:
1.Βιβλιοθήκη 2.Let VPQ3.1 ramps up slower than +3VSB. It is to meet the spec that RSMRST(AUXOK) needs to ramp up after VTR is ready with a delay (20ms for SB600). To precisely estimate the resulting delay from +3VSB to AUXOK, we need to implement the RC charge formula.
主板信號簡介



RTCRST# RSMRST# PWRBTN# SLP_S3# PS_ON# PWROK PLTRST#
RTCRST#

RTCRST#有效:在G3狀態時,拔掉battery,此時SB收到低電平,會清掉COMS 內 容;若要給主板維持時間或CMOS內容, RTCRST信號需要是高電平.
RSMRST#
RSMRST#: Resume Well Reset, this signal is used for resetting the resume power plane logic.
+5VSB +3VSB RSMRST
S5 State
1. 2. 3. 4.
After plugging power cord, +5VSB ramps up. +3VSB is regulated from +5VSB. 32ms after +3VSB ramps above VTRIP (2.2V), RSMRST asserts. RSMRST will re-assert after AC power loss, which acts like a wake up event of SB and causes the de-assertion of SLP_S3# to turn on the system.
主板基本電壓
狀態電壓種類有3種

1.Main power: S0/S1 2.Dual power:S0/S1/S3 3.Standby power:S0/S1/S3/S4/S5
詳細參考附件：
Main Power
Main power的產生由SLP_S3#去控制。
按Power Button PWRBTN#拉low 通知SIOSIO告知NB NB 送出SLP_S3#(此時SLP_S3#為高電平) PSON# 被拉low Power Supply產生Main Power.
灰色: +5V Power OK signal 綠色: +5V (PS_ON#,電源工作電壓)
PSON#
• 在主板上,未開機時(S5時), 此信號PSON#一直被pull up到+5VSB.???
• 當User按下Power Button後,一般由Super I/O將此信號拉low,從而通 知Power Supply送電. • 當實驗時,可以直接把Power supply的PSON#用導線與GND瞬間導通, 則此時Power Supply開始工作.
SLP_S3#
S0 SLP_S3# SLP_S4# SLP_S5# H H H S1 H H H S3 L H H S4 L L H S5 L L L
ATX POWER
Press Power Button
1. PWRBTN# SLP_S5# SLP_S4# SLP_S3# PS_ON# 3. 4.
2.
In Intel platform, SLP_S3# is always used to turn on the power supply. When resuming from S3/S4, any wake up event will cause the deassertion of SLP_S3#~SLP_S5#, and the rest of the power-up power sequence is the same with those resuming from S5. Some SIO, ex:SMSC5127, uses inverted SLP_S3# to generate nPS_ON#. In SIS platform, PS_ON# is generated from SB itself (ex:SIS 968).
Power Sequence
+5v/-5v
CPU Pson#(-)
Cpu rst
POWER
+3v +12v/-12v
NB
NB_ RESET
Power ok
SUPER I/O OR AS016
+5v +3v
Pwr ok
Slp-s3(+) SB
Reset
PWRBTN
Intel chipset power on sequence
Power-up (Main Power)
CH1:+12V Ch2:+5V Ch3:+3V
1. 2.
Main power (+12V,+5V,+3V) almost ramp up at the same time. The main power ramp behavior depends on the power supply design.
主板上電過程
Willess 2009/6/10
前言



電腦的開機只需要對著Power鍵輕輕一按 即可. 可這一按具體是如何使電腦能開機工作 的呢?它的整個過程是怎樣的? 以下分幾個部分做講解
Content

開機上電動作圖解 主板的電壓定義 主板的主要開機信號介紹 主板開機上電過程（波形和電路）
PWROK

PWROK有的資料也叫PWRGD, 是電源準備OK的信號.Power Supply 中會有PWROK,更多的在主板上,且分很多種, 如CPU_PWRGD, NB_PWRGD, VRMPWRGD, VTT_PWRGD. 當電源送出的+3.3V and +5V達到Normal值的95%時,由Power Supply送出此信號.當+3.3V or +5V 掉到Normal的95%以下時,Power Supply就會把此信號拉Low.當主板收到此信號時,表明電源已經準備 ok,可以開始動作. 但是大部分情況下,我們不會使用此信號來通知主板動作 (主板上此 PIN一般空接) .而是使用專門的ASIC來偵測+3.3V and +5V電壓,當電 源發出的電壓符合要求時,由ASIC發出PWROK信號通知主板動作.
5. CB918 must be installed: 1. Debounce, 2. Prevent ESD from directly going into SB and SIO. 1000PF is a commonly used value. 6. To achieve better ESD resist performance, CB918 should be placed near front panel header.
MB Power Sequence
主板基本電壓

主板基本電壓有5個，其他電壓都是由這5個基 本電壓轉換而得.
POWER +12V -12V +5V +3.3V +5VSB Specification 11.4 ~ 12.6V -10.8 ~ 13.2V 4.75 ~ 5.25V 3.14 ~ 3.47V 4.75 ~ 5.25V
3.0V
Battery
2.6V
2.9V
1. 2.
BATT
G3 State S5 State
BATT comes from BATTERY at G3 state. So BATT will be 2.6V at G3 state. BATT comes from +3VSB at S5 state. So BATT will be 2.9V at S5 state.
Standby Power
1， 在MB上，power supply只提供+5VSB一種standby 電壓, 其他standby power都由它轉出來的。 2，Standby power上電(插上power cord)主板就會有， 但其提供的電流有限。
Dual Power
Dual power由standby power和main power 提供，他存在於S0,S1,S3這幾種狀態下，由 Gate信號去控制哪一個power輸出。
+12V,+5V,+3V
S0 State
PSON#
• PSON# 是低有效信號,當此信號為Low時,Power Supply送 出+3.3V,+5V,-5V,+12V,-12V等電壓. 而當此信號被拉High 時,Power Supply停止送出上面的電壓. • 利用此信號可以設計“ Soft Power down” 的關機功能. 當使用者對作業系統下關機命令時. 作業系統亦可關閉所 有的應用程式並利用此腳的功能達到自動關機的動作.
PWRBTN#
PWRBTN#: Power Button, #:代表低電平有效
PWRBTN#
1. 2. 3. 4. Pin6 and pin8 is connected to the power button on the chassis. Pressing power button generate a low pulse to SB and SIO. Power button can be programmed to generate suspend, hibernate or shut-down event. Generally PWRBTN# of SB is internal pulled high, R1336 is reserved to avoid internal pull-high malfunction. This must be pulled to standby power.