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Hello everyone, in this lesson, let's take a look at some noun explanations for the trigger part of the hard start

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The trigger part refers to the state before the power supply is generated

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after the computer is in the standby state and the switch is pressed.

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First up is PWRBTN#

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It is a wake-up signal sent by IO to the bridge

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It's a high low high jump

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The function of this signal is to notify the bridge to start working.

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When the bridge gets the PWRBTN# signal,

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it will start working and send out the following status indication signals

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The first is SLP_S5#, high level, generally 3.3 volts

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Indicates exiting the shutdown state

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SLP_S4# is the same as SLP_S5#, it is also a high level of 3.3 volts, which means exiting the sleep state

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SLP_S3 is also 3.3 volts, which means exiting the sleep state

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Next is SLP_A# and SLP_LAN#

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These two signals are generally not used, we just need to understand

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SLP_A# is used to turn on ME power supply in some 89 series motherboards

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In the 100 series and later series, most of them have not adopted

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SLP_LAN# is a network card control signal, which is generally not used

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Here we need to pay attention, although these signals are followed by #,

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but these signals are high level in normal times

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For example SLP_S4#

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SLP_S4 refers to the sleep state, # means low level

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The meaning of the signal is that the low level enters the dormant state

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When it is high, it means exiting the sleep state

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Therefore, these signals are all high in the normal power-on state.