Advance Data Sheet, Rev. 9
June 2001
USS-344 QuadraBusTM
Four-Host PCI-to-USB OpenHCI Host Controller
Features
I
32-bit, 33 MHz PCI interface compliant with PCI Local
Bus Specification Revision 2.2
I
Four downstream USB ports
I
Each USB port dedicated to providing full USB band-
width to the attached device
I
Full compliance with Universal Serial Bus Specifica-
tion Revision 1.1
I
OpenHCI Open Host Controller Interface Specifica-
tion for USB Release 1.0a compatible
I
Fully compatible with Microsoft Windows 98/95/Win-
dows NT * standard OpenHCI drivers
I
Fully compatible with Mac
OS 8.5 and 8.6
I
Integrated dual-speed USB transceivers
I
3 V or 5 V switchable PCI signaling
I
Low-power mode and wake-up compatible with PCI
Power Management Interface Specification Revision
1.1
I
Supports up to 127 devices per port
I
Supports peripheral hot swap and wake-up
I
Support for legacy keyboard and mouse
I
128-pin TQFP package
I
Full 12 Mbits/s bandwidth per port
I
Evaluation kit:
-- PCI card
-- Data sheet
I
0.25
m technology
Applications
I
Seamless integration with 3 V or 5 V PCI-based com-
puter products
I
Supports all USB compliant devices and hubs
I
Simultaneous operation of multiple high-performance
devices
Description
The Agere Systems Inc. USS-344 QuadraBus provides
a single-chip four-host PCI-to-Universal Serial Bus
(USB) solution. The USS-344 interfaces directly to any
32-bit, 33 MHz PCI bus and is ideal for either onboard
applications or add-in card applications. It can easily be
configured to communicate in either a 3 V PCI environ-
ment or 5 V PCI environment simply by selecting the
appropriate communications voltage level on the VIO
input pin.
The USS-344 provides four downstream USB ports for
connectivity with any USB compliant device or hub. Full-
speed or low-speed peripherals are supported along
with all of the USB transfer types: control, interrupt,
bulk, or isochronous. The USS-344's OpenHCI compli-
ance offers significant USB performance benefits and
reduced CPU overhead compared to other USB UHCI
host controllers.
In addition, the USS-344 offers a significant perfor-
mance advantage over all other USB host controllers
(both UHCI and OHCI) by providing full USB bandwidth
to each port rather than sharing the USB bandwidth
over all ports. This results in an increase in the number
of devices which can feasibly be connected to a
computer system as well as ensuring high-bandwidth
devices, such as video cameras and audio devices, are
always provided with the high bandwidth they need
while other USB devices are in use.
The USS-344 is a multifunction PCI device with one
single-port USB host controller per PCI function. There
are four PCI functions in the USS-344 for a total of four
single-port USB host controllers. Each single-port host
controller provides the full USB bandwidth (12 Mbits/s)
for devices connected downstream of its port.
The USS-344 is fully compatible with the Microsoft
Windows standard OpenHCI drivers. The USS-344
pinout is compatible with the future release of the Agere
USB 2.0 host controller.The USS-344 is a 3.3 V device
fabricated in 0.25
m technology. Integrated dual-speed
USB transceivers enable a single-chip PCI-to-USB
solution. The USS-344 provides full support for legacy
PC peripherals as defined in the OpenHCI Open Host
Controller Interface Specification for USB Release 1.0a.
* Microsoft, Windows, and Windows NT are registered trademarks
of Microsoft Corporation.
Mac is a registered trademark of Apple Computer, Inc.
Table of Contents
Contents
Page
USS-344 QuadraBus
Advance Data Sheet, Rev. 9
Four-Host PCI-to-USB OpenHCI Host Controller
June 2001
2
Agere Systems Inc.
Features .................................................................................................................................................................. 1
Applications ............................................................................................................................................................. 1
Description ............................................................................................................................................................... 1
Applicable Documents and Specifications ............................................................................................................... 4
Pin Information ........................................................................................................................................................ 4
Register Overview ................................................................................................................................................... 8
PCI Registers ........................................................................................................................................................ 12
PCI Function 0--Single-Port USB Host Controller 0 .......................................................................................12
PCI Function 1--Single-Port USB Host Controller 1 .......................................................................................16
PCI Function 2--Single-Port USB Host Controller 2 .......................................................................................20
PCI Function 3--Single-Port USB Host Controller 3 .......................................................................................24
USB Registers ....................................................................................................................................................... 28
Legacy Support Registers ..................................................................................................................................... 35
HceInput Register............................................................................................................................................35
HceOutput Register .........................................................................................................................................36
HceStatus Register..........................................................................................................................................36
HceControl Register ........................................................................................................................................37
Connection Instructions ......................................................................................................................................... 37
PCI Connection Instructions ............................................................................................................................37
USB Connection Instructions...........................................................................................................................38
Test Mode Connection Instructions .................................................................................................................38
Legacy Configuration ............................................................................................................................................. 40
Power Connection Recommendations .................................................................................................................. 41
Power Management Interface ............................................................................................................................... 42
Configuration Space Offset 50h.......................................................................................................................43
Configuration Space Offset 51h.......................................................................................................................43
Configuration Space Offset 52h.......................................................................................................................44
Configuration Space Offset 54h.......................................................................................................................44
Configuration Space Offset 56h.......................................................................................................................45
Configuration Space Offset 57h.......................................................................................................................45
Power Consumption/Dissipation Reporting .....................................................................................................45
NAND Tree Mode .................................................................................................................................................. 46
Absolute Maximum Ratings ................................................................................................................................... 48
Electrical Characteristics ....................................................................................................................................... 49
PCI Electrical Characteristics ..........................................................................................................................49
USB Electrical Characteristics.........................................................................................................................52
Physical Markings .................................................................................................................................................. 53
Outline Diagram ..................................................................................................................................................... 53
128-Pin TQFP..................................................................................................................................................53
Ordering Information .............................................................................................................................................. 54
4
4
Agere Systems Inc.
Advance Data Sheet, Rev. 9
June 2001
Four-Host PCI-to-USB OpenHCI Host Controller
USS-344 QuadraBus
Applicable Documents and Specifications
I
PCI Local Bus Specification Revision 2.1s., June 1, 1995. PCI Special Interest Group.
I
Universal Serial Bus Specification Revision 1.1., September 23, 1998. Compaq/Digital Equipment Corporation/
IBM PC Company/Intel/Microsoft/NEC/Northern Telecom.
I
OpenHCI Open Host Controller Interface Specification for USB Release 1.0a., July 31, 1997. Compaq/Microsoft/
National Semiconductor.
I
PCI Bus Power Management Interface Specification Revision 1.1., December 18, 1998. PCI Special Interest
Group.
Pin Information
5-7830
Figure 2. USS-344 Pin Diagram
AD9 AD8
C/B
E
N0
VSS VD
D
AD7 AD6 AD5 AD4 VSS VD
D
AD3 AD2 AD1 AD0 VSS VI
O
VD
D
VSS
T
EST
0
T
EST
1
T
EST
2
T
EST
3
PR
T
P
W
R
3
P
W
R
F
LT
3N
INT
A
N
VD
D
VS
S
INT
B
N
INT
C
N
RS
T
N
VD
D
CL
K
VS
S
GNT
N
RE
QN
AD
3
1
AD
3
0
AD
2
9
VS
S
VD
D
AD
2
8
AD
2
7
AD
2
6
AD
2
5
INT
D
N
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
AD24
C/BEN3
IDSEL
AD23
AD22
VSS
VDD
AD21
AD20
AD19
AD18
VSS
VDD
AD17
AD16
C/BEN2
FRAMEN
VDD
VSS
IRDYN
TRDYN
DEVSELN
STOPN
PERRN
VSS
VDD
SERRN
PAR
C/BEN1
AD15
VDD
AD14
AD13
AD12
AD11
39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64
VSS
MIRQ12I
KIRQ1I
A20I
A20MN
IRQ1
IRQ12
VDD
VSS
SMIN
PRTPWR0
PWRFLT0N
PRTPWR1
PWRFLT1N
VDD
CLK48STOP
VSSA
XLO/CLK48
XHI
VDDA
RREF
VDDT
VSST
DPLS0
DMNS0
DPLS1
DMNS1
VDDT
VSST
DPLS2
DMNS2
DPLS3
DMNS3
VDDT
VSST
PRTPWR2
PWRFLT2N
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
104
USS-344
VDD
VDD
VSS
VSS
VD
D
VSS AD1
0
PM
EN
VS
S
VD
D
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