Texas Instruments PCI7411, PCI7611, PCI7621, PCI7421 manual PME Grst Rsvd, Dstate, 13−12

13.19 Power Management Control and Status Register

The power management control and status register implements the control and status of the Smart Card controller. This register is not affected by the internally generated reset caused by the transition from the D3hot to D0 state. See Table 13−12 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 control and status

Type

RCU

R

R

R

R

R

R

RW

R

R

R

R

R

R

RW

RW

Default

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

Register:

Power management control and status

Offset:

48h

Type:

Read/Clear/Update, Read/Write, Read-only

Default:

0000h

Table 13−12. Power Management Control and Status Register Description

BIT

FIELD NAME

TYPE

DESCRIPTION

15 ‡

PME_STAT

RCU

status. This bit is set when the function would normally assert the

signal independent of the

PME

PME

state of PME_EN bit. Writing a 1 to this bit clears it and causes the function to stop asserting a PME

(if enabled). Writing a 0 has no effect. This bit is initialized by GRST only when the PME_D3cold bit

is 1.

14−9

RSVD

R

Reserved. Bits 14−9 return 0s when read.

8 ‡

PME_EN

RW

enable. This bit is initialized by

only when PME_D3cold bit is 1.

PME

GRST

7−2

RSVD

R

Reserved. Bits 7−2 return 0s when read.

1−0 ‡

DSTATE

RW

Device State: This bit field controls device power management state. Invalid state assignments are

ignored. (ex. Current state 10b → writing 01b. This is rejected and stays 10b. See the latest PCI Local

Bus Specification.) This bit field is initialized by GRST only when PME_D3cold bit is 1.

‡ One or more bits in this register are cleared only by the assertion of GRST.

13.20 Power Management Bridge Support Extension Register

The power management bridge support extension register provides extended power-management features not applicable to the Smart Card controller; thus, it is read-only and returns 0 when read.

Bit		7	6	5	4	3	2	1	0
Name			Power management bridge support extension
Type		R	R	R	R	R	R	R	R
Default		0	0	0	0	0	0	0	0
	Register:		Power management bridge support extension
	Offset:		4Ah
	Type:		Read-only
	Default:		00h

13−12