Texas Instruments Dual/Single Socket CardBus and UntraMedia Controller PCI7621 - Manual (Page 283)

13−11
13.18 Power Management Capabilities Register
The power management capabilities register indicates the capabilities of the Smart Card controller related to PCI
power management. See Table 13−11 for a complete description of the register contents.
Bit 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Name Power management capabilities
Type RU R R R R R R R R R R R R R R R
Default 0 1 1 1 1 1 1 0 0 0 0 0 0 0 1 0
Register: Power management capabilities
Offset: 46h
Type: Read/Update, Read-only
Default: 7E02h
Table 13−11. Power Management Capabilities Register Description
BIT FIELD NAME TYPE DESCRIPTION
15 PME_D3COLD RU PME support from D3cold. This bit can be set to 1 or cleared to 0 via bit 4 (D3_COLD) in the general
control register at offset 4Ch in the PCI configuration space (see Section 13.22). When this bit is set
to 1, it indicates that the controller is capable of generating a PME wake event from D3cold. This bit state
is dependent upon the PCI7x21/PCI7x11 VAUX implementation and may be configured by using bit 4
(D3_COLD) in the general control register (see Section 13.22).
14 PME_D3HOT R PME support. This 4-bit field indicates the power states from which the Smart Card interface may
assert PME. This field returns a value of 1111b by default, indicating that PME may be asserted from
13 PME_D2 R
PME support. This 4-bit field indicates the power states from which the Smart Card interface may
assert PME. This field returns a value of 1111b by default, indicating that PME may be asserted from
the D3hot, D2, D1, and D0 power states.
12 PME_D1 R
the D3hot, D2, D1, and D0 power states.
11 PME_D0 R
10 D2_SUPPORT R D2 support. Bit 10 is hardwired to 1, indicating that the Smart Card controller supports the D2 power
state.
9 D1_SUPPORT R D1 support. Bit 9 is hardwired to 1, indicating that the Smart Card controller supports the D1 power
state.
8−6 AUX_CURRENT R Auxiliary current. This 3-bit field reports the 3.3-VAUX auxiliary current requirements. When bit 15
(PME_D3COLD) is cleared, this field returns 000b; otherwise, it returns 001b.
000b = Self-powered
001b = 55 mA (3.3-VAUX maximum current required)
5 DSI R Device-specific initialization. This function requires device-specific initialization.
4 RSVD R Reserved. Bit 4 returns 0 when read.
3 PME_CLK R PME clock. This bit returns 0 when read, indicating that the PCI clock is not required for the Smart Card
controller to generate PME.
2−0 PM_VERSION R Power-management version. This field returns 010b when read, indicating that the Smart Card
controller is compatible with the registers described in the PCI Bus Power Management Interface
Specification (Revision 1.1).