Thanks for the information.
I have referred the section which you have mentioned above in the Design guide (Rev 2.2). In the section 220.127.116.11 there is a circuit in figure 5.7 regarding auto power on using a D flip-flop (SN74LVC1G74). From this circuit the signal “Optional ACOK circuit Output” is connected to the button controller (SRC0GS22D) in figure 5.6.
In my case should for auto power on implementation as referenced in OEM design guide I should implement button controller (SRC0GS22D) and the D flip-flop (SN74LVC1G74) right? or correct me if I am wrong.
And another thing is that the implementation in reference schematics “P2822_B03_OrCAD_schematics.pdf” differs from the implementation on the OEM Design guide. So could you provide me information regarding this implementation?