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Hello everyone, today we will learn about the common chips in domestic mainboards

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First of all, let's take a look at some chips in the Loongson mainboard

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In this mainboard, this is Loongson's 3A4000

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There are four inductors that are the core power supply circuit of the CPU,

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and the voltage value is 1.25V

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There are several DrMOS controllers next to it, controlled by the main chip MP2978

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The model of these DRMOS chips is MP8690

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There is an independent power supply which is 1.29V, which is for the CPU

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There is also a 1.2V power supply next to it, which is also for the CPU

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These are the three power supplies required by the CPU

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There are several LDO power supply chips such as UP8801S on the back of the mainboard

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Let's take a look at its pin definition

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Pin 1 is POK, pin 2 is EN, pin 3 is VIN power supply input, pin 4 VCNTL is the power supply

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Pin 5 is NC, pin 6 is OUT output, pin 7 is feedback, pin 8 is grounding

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After the measurement, we know that this is a 1.23V LDO

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This is a 1.78V LDO

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Here these are 1.14V, 1.1V and 1.0V standby LDO power supplies

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This is the network card chip

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There are two UP8801S at this position and this side of the mainboard,

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they are also LDO power supply chips

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This one is 1.19V, the one above is 3.3V SB standby voltage

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There are several PWM chips of the model UP1727, which integrate MOS tubes

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This is 1.8V, this is 1.1V, this is 1.05V

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This is a 1.5V DDR3 memory power supply

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Next, here is a PWM circuit

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This is the main power supply of the memory 1.2V,

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which is generated by the control of the chip UP1537

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Here are several LDO linear power supplies

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One of them is used to control the generation of the VTT power supply of the video memory, 0.75V

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This one is used to control the generation of VTT power supply of the memory, 0.6V

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There is a set of MP8633 next to it,

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which is used to generate 2.5V VPP power supply for the memory

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Here are some other functional chips

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For example, this is an 8-bit high-speed video digital-to-analog converter with VGA interface,

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which is connected to the PCH, and the display signal is output by the PCH

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This is the signal conversion chip of the HDMI interface,

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which is also connected to the PCH, and the display signal is output by the PCH

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After conversion by this chip, it is sent to the HDMI interface

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Here is a USB3.0 controller

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There is a flash chip next to it, which is the program of the USB3.0 chip

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This is a 25Q64, with an 8MB main BIOS

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The following part is the audio circuit

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The one in the middle is the memory

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this is a clock chip

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This is an EC, and there is a flash chip next to it

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This is a SATA 3.0 controller

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It also has a flash chip hanging on the side, with independent programs

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This is a USB3.0 control chip, mainly used to control the USB3.0 interface on the front panel

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It also has a flash chip with the program

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Let's take a look at the introduction of the Phytium mainboard

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This Phytium mainboard does not have a graphics card function inside the CPU,

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it must be connected to an independent graphics card to display

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This PCIE 16X slot is used to insert a discrete graphics card,

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and there are two PCIE 8X slots next to it

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This M.2 interface is used to insert solid-state drives

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Below is the audio circuit

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This is a BIOS chip

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Here is the SATA controller, dedicated to managing these SATA interfaces

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This is a chip for the clock, gate array, and RTC, which is a logic chip

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Here is the memory power supply and the CPU power supply circuit

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The power consumption of this power supply is relatively small,

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and the power supply circuit has only one power supply

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There is an IO chip and a level conversion chip here

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Here is the Hub master chip of USB3.0 and the Hub chip of USB2.0

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There is also a USB3.0 master chip

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Ok, here are some common chips on this mainboard