Programming 39
Table 3-26 Power Management Capability Structure
Offset
31::24
23::16
15:8
7:0
0x078
Capabilities Register (Hardwire to 0x0003)
0x80 Next Cap Ptr
0x01 Capability ID
0x070
Data (hardwired to 0x00)
PM Control/Status Bridge
Extensions (hardwired to
0xx00)
Power Management Status and Control
(hardwired to 0x0008)
Table 3-27 PCIe Capability Structure
Offset
31::24
23::16
15:8
7:0
0x080
PCI Express Capabilities Register
0x00
0x10 Capability ID
0x084
Device Capabilities
0x088
Device Status
Device Control
0x08C
Link Capabilities
0x090
Link Status
Link Control
Table 3-28 PCIe Capabilities Register Bit Definition
PCIe Capabilities Register Bit Definition: Offset 0x082
Bit(s)
Field
Description
R/W
15:14
Reserved
R
13:9
Interrupt Message
Number
Not Supported. Hardwired to 0
R
8
Slot Implemented
Not Supported. Hardwired to 0
R
7:4
Device/Port type
Indicates the PCIe logical device type.
- 0001:Legacy PCI Express Endpoint
R
3:0
Capability Version
- 0x1
R
Table 3-29 Device Capabilities Register Bit Definition
Device Capabilities Register Bit Definition: Offset 0x084
Bit(s)
Field
Description
R/W
31:28
Reserved
R
27:26
Captured Slot Power
Limit Scale
Not Applicable to endpoint. Hardwired to 00 R
25:18
Capture Slot Power
Limit Value
Not applicable to endpoint. Hardwired to
00011001
R
17:15
Reserved
- 001
R
14
Power Indicator
Present
Not Supported. Hardwired to 0
R
13
Attention Indicator
Present
Not Supported. Hardwired to 0
R
12
Attention Indicator
Button Present
Not Supported. Hardwired to 0
R
11:9
Endpoint L1
Acceptable Latency
000 (less than 1 micro seconds)
R
8:6
Endpoint L0
Acceptable Latency
000 (less than 64 nano seconds)
R
5
Extended TAG Field
Supported
5-bit Tag field supported
0
R