Altera Arria V GZ Avalon-ST User Manual

Page 110

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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

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