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Hello everyone. In this lesson, let's take a look at some signals after a hard boot reset.

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After the first reset refers to the platform reset and the subsequent part

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The platform reset signal is PLTRST#

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This is a very critical signal, generally the whole machine reset signal

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This signal will be sent to many devices to reset them

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It is generally a 3.3 volt high

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CPU SVID

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When the CPU receives PROCPWRGD, it will send a signal to the CPU power supply chip

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through the SVID bus to generate CPU power supply.

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The next one is VCCCORE_CPU

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This is the CPU core power supply

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When the CPU power supply chip receives the SVID signal from the CPU,

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it will control the generation of VCCCORE_CPU power supply

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Further down DRAM_RESET#

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This is the memory reset signal

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When the CPU has power supply, the CPU will read the BIOS for self-test, which will self-test memory

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When the self-test has passed the memory, a memory reset signal will be issued

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This memory reset signal is generally a high-low-high signal

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The last one is VCCGT

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It is the integrated display power supply of the CPU

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After the mainboard self-checks the memory,

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the CPU will send out an SVID signal again to supply power to the CPU chip,

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which is used to control the power supply of the CPU integrated display.

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The set display power supply is generally 0.7 volts to 1.3 volts

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This is the explanation of some terms after reset