Altera Arria V GZ Avalon-ST User Manual
Page 110
Figure 5-42: Layout of Power Management Capabilities Register
data_select
data_scale
PM_state
PME_EN
PME_status
reserved
15
0
1
16
23
8
2
7
9
12
13
14
24
31
reserved
data
register
Table 5-20: Power Management Capabilities Register Field Descriptions
Bits
Field
Description
[31:24]
Data register
This field indicates in which power states a function can assert
the
PME# message
.
[23:16]
reserved
—
[15]
PME_status
When set to 1, indicates that the function would normally assert
the
PME#
message independently of the state of the
PME_en
bit.
[14:13]
data_scale
This field indicates the scaling factor when interpreting the value
retrieved from the data register. This field is read-only.
[12:9]
data_select
This field indicates which data should be reported through the
data register and the
data_scale
field.
[8]
PME_EN
1: indicates that the function can assert PME#0: indicates that the
function cannot assert PME#
[7:2]
reserved
—
[1:0]
PM_state
Specifies the power management state of the operating condition
being described. The following encodings are defined:
• 2b’00 D0
• 2b’01 D1
• 2b’10 D2
• 2b’11 D3
A device returns 2b’11 in this field and
Aux
or
PME Aux
in the
type
register to specify the D3-Cold PM state. An encoding of
2b’11 along with any other
type
register value specifies the D3-
Hot state.
5-58
Power Management Signals
UG-01127_avst
2014.12.15
Altera Corporation
Interfaces and Signal Descriptions