Schematic diagram of the working principle of the motherboard clock circuit

Shown is a schematic diagram of the working principle of the motherboard clock circuit.
    The 3.3 V or 2.5 V voltage in the figure is a prerequisite for the clock circuit to work normally and is the voltage source of the clock signal generator chip . After 3.3 V or 2.5 V is sent to the clock generator chip through the resistor, the clock generator starts to oscillate and the 14.318 MHz crystal is used as the resonant component
of the clock generator .
When the motherboard is working normally, the two pins of the crystal oscillator should have about 1 V DC voltage.
    Usually, the 3.3 V voltage is directly provided by the orange line of the AIX power supply, and the 2.5 V voltage is obtained from the 3.3 V voltage through the DC regulator.
    When the 3.3 V and 2.5 V supply voltages are started, the internal oscillator of the clock signal generator chip starts to work and forms a 14.318 MHz
clock signal. After the signal is processed by its internal upconverter, downconverter, etc., it obtains clock frequencies of different values ​​(such as 14.318 MH2, 33 MH,
48 MHz, etc.), and then outputs through the pin of the clock signal generator chip, and then passes through the peripheral of the chip . Current-limiting small-value resistors (22n, 33n
, etc.) are then sent to each module of the motherboard to provide clock frequency.