Desktop Motherboard Power Sequence Pdf Exclusive Site

: The CMOS battery provides voltage to the Southbridge/PCH to maintain the Real-Time Clock (RTC).

Before the power button is even pressed, the motherboard must establish baseline voltages to listen for a wake signal. desktop motherboard power sequence pdf exclusive

: The RTC crystal must oscillate to provide timing for the Southbridge's standby logic. : The CMOS battery provides voltage to the

: The SIO sends this 3.3V high-level signal to the PCH to notify it that standby power is stable and the system is ready to be "resumed". 2. Triggering Phase (Power Button Event) desktop motherboard power sequence pdf exclusive

: When the ATX power supply is plugged in, it immediately sends +5V standby (purple wire) to the Super I/O (SIO) chip.