
Flash Media Controller Programming Model
212
September 2005
SCPS110
11.18 Power-Management Control and Status Register
The power-management control and status register implements the control and status of the flash media
controller. This register is not affected by the internally generated reset caused by the transition from the D3hot
to D0 state. See Table 1113 for a complete description of the register contents.
Function 2 offset:
48h
Register type:
Read/Clear, Read/Write, Read-only
Default value:
0000h
BIT NUMBER
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
RESET STATE
0
Table 1113. Power-Management Control and Status Register Description
BIT
FIELD NAME
TYPE
DESCRIPTION
15
PME_STAT
RCU
PME status. This bit defaults to 0b.
1413
DATA_SCALE
R
This field returns 00b, because the data register is not implemented.
129
DATA_SELECT
R
This field returns 0h, because the data register is not implemented.
8
PME_EN
RW
PME enable. Enables PME signaling. assertion is disabled.
72
RSVD
R
Reserved. Bits 72 return 00 0000b when read.
10
PWR_STATE
RW
Power state. This 2-bit field determines the current power state and sets the flash media controller to
a new power state. This field is encoded as follows:
00 = Current power state is D0.
01 = Current power state is D1.
10 = Current power state is D2.
11 = Current power state is D3hot.
One or more bits in this register are cleared only by the assertion of GRST.
11.19 Power-Management Bridge Support Extension Register
The power-management bridge support extension register provides extended power-management features
not applicable to the flash media controller; thus, it is read-only and returns 00h when read.
Function 2 offset:
4Ah
Register type:
Read-only
Default value:
00h
BIT NUMBER
7
6
5
4
3
2
1
0
RESET STATE
0
11.20 Power-Management Data Register
The power-management bridge support extension register provides extended power-management features
not applicable to the flash media controller; thus, it is read-only and returns 00h when read.
Function 2 offset:
4Bh
Register type:
Read-only
Default value:
00h
BIT NUMBER
7
6
5
4
3
2
1
0
RESET STATE
0