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First reset signal on computer, how to work !

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    First reset signal on computer, how to work !

    FIRST RESET SIGNAL ON COMPUTER CIRCUIT
    RSMRST#
    When the Power,Bios,Ec are OK, the RSMRST# will go Hi. In the other word,this pin go Low only when the systemreset.If BIOSdata is error,RSMRST# won't go HI.
    When SIO(EC) get +V_RTC
    thecrystal will work.
    1. RTC have to be oscillating(32.768KHz).
    2. RTCRST# have to be high.
    3. RSMRST# have to be inactive (high).
    4. PWRBTN# have a trigger.
    5. LOW_BAT# have to be inactive (high).
    If this 5 present, then EC will issue SLP_S3# /SLP_S5, in the old ICH SLP_S3 and SLP_S5 will generate directly to ICH.
    When All+V?S/+V? powers are ready, PWR_GOOD will tie to high to turn on CPU powers(+VCCP and +VCC_CORE).
    SB/PCH Power good--->SB/PCH pwr_btn--->PCH RUN
    SUSB# from PCH toSIO pull up the signal SLP_S3# The signal is used to shut power off /on through logic gate transistor or IC
    SUSC# from PCH to SIO pull up the signal SLP_S5# The signal is used to shut power off /on through logic gate transistor or IC
    ICH/SB,MCH & CPU Signal Checking
    IMVP_PWRGD => CLK_ENABLE# => RESET_OUT#=> ICH_PWRGD => PLTRST# => PCI_RST=> H_PWRGOOD
    CPU generate the first cycle to read the BIOS code
    CPU bus DMI LPC SPI
    CPU ===> GMCH===> ICH===>SIO ===> BIOS
    CPU MASTER POWER
    VR_ON Enable--->+VCCORE 08VS to 1,5VS
    Memory +VTT and +V1.5VS (DDR3) is ok, the PGOOD VTT_PWRGD pull high to CPU first than ICH will tie H_PWRGD to high ,then NB will tie CPURST# to reset CPU.
    Crystal clock Oscilator CLOCK SUMMARY
    (1) 32.768KHz to SIO Required +V_RTC and to ICH(chipset) also Required +V_RTC
    (2) 49.152MHz to (audio controller) Required +V3S
    (3) 27MHz to Graphic chip (video controller )Required +V3S
    (4) 14.318MHz to (clock Generator) Required +V3S
    Make sure crystal is oscillating for EC(SIO),SB/ICH/PCH and VGA or it will no post
    Clock Generator
    Elementary required
    1) Power : +V3S
    (2) Crystal : 14.318MHz
    (3) Control : PCISTOP# , CPUSTOP#_ is HI
    When +VCC_CORE is ready, CLKEN#will go high to enable clock-Generator and turn all clock.
    PCI_STOP# and CPU_STOP# must beat high otherwise some clocks will be turned off.
    Clock out -->SIO(EC)-->PCH/SB-->NB-->CPU
    LPC_Frame-->SB output signal is high
    Note High signal can be identified by measuring 3.3V available
    Power by experiences of adiedkhaz

    #2
    Re: First reset signal on computer, how to work !

    Highpulse thanks . It is very useful to all. Please upload other topic

    Comment


      #3
      Re: First reset signal on computer, how to work !

      always i got a nice subject i usually post ,

      Comment


        #4
        Re: First reset signal on computer, how to work !

        ty im a noob at this stuff.. nice guide, tnx
        Im Back... sort of...

        Comment


          #5
          Re: First reset signal on computer, how to work !

          sure mate , we are for help , this is not from myself , credits goes to the name below the following infos.

          Comment


            #6
            Re: First reset signal on computer, how to work !

            Here is the link, found it.
            http://adiedkhazbook.blogspot.com

            Comment


              #7
              Re: First reset signal on computer, how to work !

              Good. Thanks

              Comment


                #8
                Re: First reset signal on computer, how to work !

                Thanks

                Comment


                  #9
                  Re: First reset signal on computer, how to work !

                  Many thanks

                  Comment


                    #10
                    Re: First reset signal on computer, how to work !

                    thanks

                    Comment


                      #11
                      Re: First reset signal on computer, how to work !

                      Thank you very much Sir.

                      Comment


                        #12
                        Re: First reset signal on computer, how to work !

                        Thanks Sir ��

                        Comment


                          #13
                          Re: First reset signal on computer, how to work !

                          what about slp s3 and slp s5

                          Comment


                            #14
                            Re: First reset signal on computer, how to work !

                            very interesting and useful post
                            thank you!

                            Comment


                              #15
                              Re: First reset signal on computer, how to work !

                              thank you

                              Comment


                                #16
                                Re: First reset signal on computer, how to work !

                                wow thanks

                                Comment


                                  #17
                                  Re: First reset signal on computer, how to work !

                                  big thanks bro

                                  Comment


                                    #18
                                    Re: First reset signal on computer, how to work !

                                    32.768KHz if missing what might it be the prolem?

                                    Comment


                                      #19
                                      Re: First reset signal on computer, how to work !

                                      Thanks Sir

                                      Comment


                                        #20
                                        Re: First reset signal on computer, how to work !

                                        Thank you very much!

                                        Comment

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