18 capability id and next item pointer registers – Texas Instruments Dual/Single Socket CardBus and UntraMedia Controller PCI7621 User Manual
Page 172
7−12
7.18 Capability ID and Next Item Pointer Registers
The capability ID and next item pointer register identifies the linked-list capability item and provides a pointer to the
next capability item. See Table 7−15 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
Capability ID and next item pointer
Type
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
Default
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
Register:
Capability ID and next item pointer
Offset:
44h
Type:
Read-only
Default:
0001h
Table 7−15. Capability ID and Next Item Pointer Registers Description
BIT
FIELD NAME
TYPE
DESCRIPTION
15−8
NEXT_ITEM
R
Next item pointer. The PCI7x21/PCI7x11 controller supports only one additional capability that is
communicated to the system through the extended capabilities list; therefore, this field returns 00h
when read.
7−0
CAPABILITY_ID
R
Capability identification. This field returns 01h when read, which is the unique ID assigned by the PCI
SIG for PCI power-management capability.