4.30 Functional Strap Definitions –Table 6
Name
Usage
When
Sampled
Comment
GNT[0]#
Boot BIOS
Strap bit[0]
BBS[0]
Rising edge of
PWROK
This Signal has a weak internal pull-up.
Note: the internal pull-up is disabled after PCIRST# de-asserts.
This field determines the destination of accesses to the BIOS
memory range. Also controllable via Boot BIOS Destination
bit (Chipset Config Registers:Offset 3410h:bit 10). This strap
is used in conjunction with Boot BIOS Destination Selection 1
strap.
Bit11 Bit 10 Boot BIOS Destination
0 1 Reserved
1 0 PCI
1 1 SPI
0 0 LPC
NOTE:
If option 00 LPC is selected BIOS may still be placed
on LPC, but all platforms with Ibex Peak require SPI flash
connected directly to the Ibex Peak's SPI bus with a valid
descriptor in order to boot.
NOTE:
Booting to PCI is intended for debut/testing only.
Boot BIOS Destination Select to LPC/PCI by functional strap
or via Boot BIOS Destination Bit will not affect SPI accesses
initiated by Management Engine or Integrated GbE LAN.