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PCI6421 Datasheet(PDF) 189 Page - Texas Instruments |
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PCI6421 Datasheet(HTML) 189 Page - Texas Instruments |
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189 / 204 page  9−11 9.18 Power Management Capabilities Register The power management capabilities register indicates the capabilities of the Smart Card controller related to PCI power management. See Table 9−11 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 9−11. 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 9.22). 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 PCI6x21/PCI6x11 VAUX implementation and may be configured by using bit 4 (D3_COLD) in the general control register (see Section 9.22). 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). |
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