XIO2000AI TAOS [TEXAS ADVANCED OPTOELECTRONIC SOLUTIONS], XIO2000AI Datasheet - Page 74

• Manufacturer Part Number: XIO2000AI
• Description: PCI Express to PCI Bus Translation Bridge
• Manufacturer: TAOS [TEXAS ADVANCED OPTOELECTRONIC SOLUTIONS]

Classic PCI Configuration Space
4.32 Power Management Capabilities Register
64
15:11
BIT
8:6
2:0
10
9
5
4
3
SCPS155C
This read-only register indicates the capabilities of the bridge related to PCI power management. See
Table 4−18 for a complete description of the register contents.
RESET STATE
PME_SUPPORT
AUX_CURRENT
BIT NUMBER
D2_SUPPORT
D1_SUPPORT
PM_VERSION
FIELD NAME
PCI register offset:
Register type:
Default value:
PME_CLK
RSVD
DSI
Table 4−18. Power Management Capabilities Register Description
15
ACCESS
0
R
R
R
R
R
R
R
R
14
0
PME support. This 5-bit field indicates the power states from which the bridge may assert PME.
Because the bridge never generates a PME except on a behalf of a secondary device, this field
is read-only and returns 00000b.
This bit returns a 1b when read, indicating that the function supports the D2 device power state.
This bit returns a 1b when read, indicating that the function supports the D1 device power state.
3.3 V AUX auxiliary current requirements. This field returns 000b since the bridge does not
generate PME from D3 cold .
Device specific initialization. This bit returns 0b when read, indicating that the bridge does not
require special initialization beyond the standard PCI configuration header before a generic class
driver is able to use it.
Reserved. Returns 0b when read.
PME clock. This bit returns 0b indicating that the PCI clock is not needed to generate PME.
Power management version. If bit 26 (PCI_PM_VERSION_CTRL) in the general control register
(offset D4h, see Section 4.65) is 0b, then this field returns 010b indicating revision 1.1
compatibility. If PCI_PM_VERSION_CTRL is 1b, then this field returns 011b indicating revision
1.2 compatibility.
13
0
52h
Read-only
0602h
12
0
11
0
10
1
9
1
8
0
DESCRIPTION
7
0
6
0
5
0
April 2007 Revised October 2008
4
0
3
0
2
0
1
1
0
0