KB9012QF is a programmable IO which means the BIOS is present within it. There is a list of programmable SIO provided. So we are going to see Compal Motherboard SIO IO requirements supply names
Supplies for Compal Motherboard IO / SIO
- VCIN_PH, VCOUT1_PH, VCOUT0_PH#
- EC_SPI_MISS1, EC_SPI_MIS_1, EC_SPI_CLR_R, EC_SPI_CS0#
- SIO_SLP_S4#, SIO_SLP_S5#, SIO_SLP_S3#
We are going to see them one by one with a description
VCC is also called as Digital VCC.
AVCC is an analog signal which is also called a wake up signal.
EC_RST# is a EC Reset signal.
ACIN which is also ACOK signal which comes from charging IC.
It is a LID Switch signal also it will come 0volt if problem with this signal.
6. VCIN_PH, VCOUT1_PH, VCOUT0_PH#
They are thermal pin signals which mean related to thermal pins. When PH comes in the signal it means thermal pin.
7. EC_SPI_MISS1, EC_SPI_MIS_1, EC_SPI_CLR_R, EC_SPI_CS0#
These are data pins also, specially when BIOS is present inside the SIO then we can’t check BIOS pins. We can check whether correct data is coming via DSO.
This enables pin of source for 3v 5v step down section ic.
AFTER PRESSING POWER BUTTON
3v is present there and when we press the power button it goes to 0v and when we release the power button it comes to 3v.
3v comes in this signal before the power button is pressed in some motherboards and in some motherboards after pressing the power button.
It gives a 3v output after the power button is released.
From this 3v goes to PCH or SOC in modern laptops.
13. SIO_SLP_S4#, SIO_SLP_S5#, SIO_SLP_S3#
There also comes S5 and S0 signal if it presents in the schematic.