XIO3130
www.ti.com
SLLS693F–MAY 2007–REVISED JANUARY 2010
4.3.47 Next-Item Pointer Register
The contents of this read-only register indicate the next item in the linked list of capabilities for the
XIO3130 downstream port. This register reads 00h, which indicates that no additional capabilities are
supported.
PCI register offset:
Register type:
91h
Read only
00h
Default value:
BIT NUMBER
RESET STATE
7
6
5
4
3
2
1
0
0
0
0
0
0
0
0
0
4.3.48 PCI Express Capabilities Register
This register indicates the capabilities of the downstream port of the XIO3130 related to PCI Express.
PCI register offset:
Register type:
92h
Read only
0061h
Default value:
BIT NUMBER
RESET STATE
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
0
0
0
0
0
0
0
0
0
1
1
0
0
0
0
1
Table 4-73. Bit Descriptions – PCI Express Capabilities Register
BIT
FIELD NAME
ACCESS
DESCRIPTION
Reserved. When read, these bits return zeros.
15:14
RSVD
r
Interrupt message number. This field is used for MSI support and is implemented as read-only
zero.
13:9
INT_NUM
r
Slot implemented. This bit indicates whether the port is connected to a slot connector (e.g., for
PCI Express, ExpressCard™ or other add-in cards). This field can be programmed by writing to
the General Control register.
8
SLOT
r
0 – Port not connected to a slot
1 – Port connected to a slot
Device/Port type. This read-only field returns 0110b, which indicates that the device is a
downstream port of a PCI Express XIO3130.
7:4
3:0
DEV_TYPE
VERSION
r
r
Capability version. This field returns 0001b, which indicates revision 1 of the PCI Express
capability.
4.3.49 Device Capabilities Register
The Device Capabilities register indicates the device-specific capabilities of the XIO3130 downstream port.
PCI register offset:
Register type:
94h
Read Only; Hardware Update
0000 8XX1h
Default value:
BIT NUMBER
RESET STATE
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
BIT NUMBER
RESET STATE
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
1
0
0
0
u
u
u
v
v
v
0
0
0
0
0
1
Copyright © 2007–2010, Texas Instruments Incorporated
XIO3130 Configuration Register Space
107
Submit Documentation Feedback
Product Folder Link(s): XIO3130
TI [ TEXAS INSTRUMENTS ]
