SB4002A_Data Sheet_EN

SB4002A
55
Serial ROM Address(25h) : EXROM Base Address 2nd Byte
Serial ROM Address(25h) represents the bit array [15:8] of Expansion ROM Base Address[31:0]
of PCI Configuration Space 30h~33h.
Serial ROM Address(26h) : EXROM Base Address 3rd Byte
Serial ROM Address(26h) represents the bit array [23:16] of Expansion ROM Base Address[31:0]
of PCI Configuration Space 30h~33h.
Serial ROM Address(27h) : EXROM Base Address 4th Byte
Serial ROM Address(27h) represents the bit array [31:24] of Expansion ROM Base Address[31:0]
of PCI Configuration Space 30h~33h.
Serial ROM Address(28h) : Capabilities Pointer
Serial ROM Address(28h) represents Capabilities Pointer [7:0].
SB4002A provides 3 types of Capability; PCI Power Management Interface(Capability ID = 01h),
VPD(Capability ID = 03h) and CompactPCI How Swap(Capability ID = 06h). PCI Spec 3.0
defines total 17 types of Capabilities, and SB4002A supports only 3 types.
The PCI Power Management Interface Capability List is located in 40h~47h of the PCI
Configuration Space, and the VPD Capability List is located in 48h~4Fh of the PCI Configuration
Space.
The CompactPCI Hot Swap Capability List is in 50h~53h.
If you wish to use the 3 types of Capability above, store 40h in the PCI Configuration Space 34h.
Then the PCI Power Management Interface Capability is enabled. Store 48h in 41h, then, the
VPD Capability is enabled.
Store 50h in 49h to enable CompactPCI Hot Swap Capability. In 51h, because no more
Capability is supported, 00h is stored.
If you want to use the PCI Power Management Interface Capability and the CompactPCI Hot
Swap Capability only, store 40h and 50h in 34h and 41h, respectively, of the PCI Configuration
Space.
If you want to use the PCI Power Management Interface Capability only, store 40h and 00h in
34h and 41h, respectively, of the PCI Configuration Space.