ALL ABOUT SOUTH BRIDGE CHIP SET VOLTAGE AND SIGNALS IN LAPTOP AND DESKTOP MOTHERBOARDS.
IT IS VERY IMPORTANT FOR LAPTOP AND DESKTOP MOTHERBOARD REPAIRING, WHAT ARE THE MAIN FUNCTIONS OF SOUTH BRIDGE IC. 1.RTC circuit: Southbridge internal real time clock circuit, also called CMOS circuits, mainly used to store the time and date and ESCD (Extended System Configuration Data). 2. Return circuit (module) : is part of the South Bridge internal power management module, all the signals are thus SLP module circuit is completed. 3.VccSus: back module (module restart) power ICH4 inside, there are three V5REF_Sus VccSus3_3 VccSus1_5 and power. Wherein VccSus3_3 return module I / O buffer circuit power; VccSus1_5 is mains voltage return module ' V5REF_Sus return module 5V reference voltage input. 4.PWROK: This signal is sent to the ICH4M representative ICH4 core voltage of the normal power-good signal from the outside, when PWROK canceled, ICH4 will refer PCIRST #. It is worth noting that in three of the RTC clock, PWROK failure. So as to ensure ICH4 produce normal PCIRST #. 5...