312 provides a single-chip PCI-to-Universal Serial
Bus (USB) solution. The USS-312 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 environment or 5 V PCI environment simply
by selecting the appropriate communications voltage
level on the VIO input pin.
The USS-312 provides two 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-
312’s OpenHCI compliance offers significant USB
performance benefits and reduced CPU overhead
compared to other host controllers.
The USS-312 is fully compatible with the
Microsoft
Windows
Standard OpenHCD Drivers.
The USS-312 is a 3.3 V device fabricated in 0.35
µm
technology. Integrated dual-speed USB transceivers
enable a single-chip PCI-to-USB solution.
The USS-312 supports the legacy peripherals
feature, as defined in the
OpenHCI Specification
Release 1.0a.
An advanced power management capabilities inter-
face compliant with
PCI Bus Power Management
Interface Specification Revision 1.1
is present to offer
a variety of power savings modes to the host system.
32-bit, 33 MHz PCI interface compliant with
PCI
Local Bus Specification Revision 2.1s
Two downstream USB ports
Full compliance with
Universal Serial Bus Specifi-
cation Revision 1.1
s
s
s
OpenHCI Open Host Controller Interface Specifi-
cation for USB Release 1.0a
compatible
Provides advanced power management capabili-
ties compliant with
PCI Bus Power Management
Interface Specification Revision 1.1
Fully compatible with
Microsoft Windows*
Stan-
dard OpenHCD Drivers
Supports legacy keyboard and mouse devices
Integrated dual-speed USB transceivers
3 V or 5 V switchable PCI signaling
Part of Lucent USB
Silicon Suite
®
technology fam-
ily
100-pin MQFP and 100-pin TQFP
Evaluation kit available
s
s
s
s
s
s
s
s
Applications
s
Seamless integration with 3 V or 5 V PCI-based
computer products
Supports all USB compliant devices and hubs
s
13
*
Microsoft
and
Windows
are registered trademarks of Microsoft
Corporation.
USS-312
Two-Port PCI-to-USB OpenHCI Host Controller
Advance Data Sheet, Rev. 4
August 1999
Table of Contents
Contents
Page
Features ...................................................................................................................................................................1
Applicable Documents and Specifications ............................................................................................................... 3
Pin Information ........................................................................................................................................................ 4
USB Registers ....................................................................................................................................................... 15
Legacy Support Registers ..................................................................................................................................... 22
USB Connection Instructions ................................................................................................................................. 25
Power Connection Recommendations .................................................................................................................. 25
Power Management Interface ............................................................................................................................... 26
Configuration Space Offset 50h ......................................................................................................................27
Configuration Space Offset 51h ......................................................................................................................27
Configuration Space Offset 52h ......................................................................................................................28
Configuration Space Offset 54h ......................................................................................................................29
Configuration Space Offset 56h ......................................................................................................................29
Configuration Space Offset 57h ......................................................................................................................30
Power Consumption/Dissipation Reporting .....................................................................................................30
NAND Tree Mode ...................................................................................................................................................31
Absolute Maximum Ratings ................................................................................................................................... 33
USB Electrical Characteristics.........................................................................................................................36
Ordering Information .............................................................................................................................................. 39
2
Lucent Technologies Inc.
Advance Data Sheet, Rev. 4
August 1999
USS-312
Two-Port PCI-to-USB OpenHCI Host Controller
Description
(continued)
USS-312 PCI-TO-USB OpenHCI HOST CONTROLLER
ROM
BIOS
MASTER
FIFOs
ADDRESS
W DATA
ADDRESS/
DATA
PARITY
ADDRESS/
DATA
MUX
DATA
R DATA
ADDRESS
ADDRESS
R DATA
W DATA
PCI BUS
SLAVE
FIFOs
IDSEL
CONFIG.
BLOCK
PCI
SLAVE
CONTROL
PCI
MASTER
CONTROL
INTR.
BLOCK
GLUE
ADDRESS
DATA
DATA
CONTROL
DATA
HCI CONTROL
CONTROL
USB
SLAVE
STATE
BLOCK
CONTROL
OHCI
REG
CONTROL
ROOT
HUB
AND
HOST
SIE
CLOCK
MUX
12/1.5
OHCI
ROOT
HUB
PORT
1
USB
TX
DATA
ADDRESS/
DATA
CONTROL
HCI
MASTER
BLOCK
LIST
PROCESSOR CONTROL
BLOCK
CONTROL
DATA
ED AND TD CONTROL
REGS
STATUS
DATA
DATA
STATUS
64 x 8
FIFO
CONTROL
ADDRESS
DATA
DATA
DATA
DATA
PORT
2
USB
HSIE
S/M
DPLL
RX
F-BUS CONTROL
FIFO STATUS
PCI
CONTROL
INTA
F-BUS IRQ
FIFO
64 x 8
5-5596b.r2
Figure 1. USS-312 Interconnection Diagram
Applicable Documents and Specifications
s
s
PCI Local Bus Specification Revision 2.1s.,
June 1, 1995. PCI Special Interest Group.
Universal Serial Bus Specification Revision 1.1.,
September 23, 1998. Compaq/Digital Equipment Corporation/
IBM PC Company/Intel/Microsoft/NEC/Northern Telecom.
OpenHCI Open Host Controller Interface Specification for USB Release 1.0a.,
July 31, 1997. Compaq/Microsoft/
National Semiconductor.
PCI Bus Power Management Interface Specification Revision 1.1.,
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