gEfiMdePkgTokenSpaceGuid.PcdPlatformBootTimeOut

The number of seconds that the firmware will wait before initiating the original default boot selection.
A value of 0 indicates that the default boot selection is to be initiated immediately on boot.
The value of 0xFFFF then firmware will wait for user input before booting.
Boot Timeout (s)

PCD Information

Name	Token Space	Token number	Data Type	Default Value
PcdPlatformBootTimeOut	gEfiMdePkgTokenSpaceGuid	0x0000002c	UINT16	0xffff