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What is USS312?

This electronic component, produced by the manufacturer "Lucent", performs the same function as "2-Port PCI-to-USB OpenHCI Host Controller".


USS312 Datasheet PDF - Lucent

Part Number USS312
Description 2-Port PCI-to-USB OpenHCI Host Controller
Manufacturers Lucent 
Logo Lucent Logo 


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www.DataSheeAt4Ud.vcoamnce Data Sheet, Rev. 5
March 2000
USS-312
Two-Port PCI-to-USB OpenHCI Host Controller
Features
s 32-bit, 33 MHz PCI interface compliant with PCI
Local Bus Specification Revision 2.1s
s Two downstream USB ports
s Full compliance with Universal Serial Bus Specifi-
cation Revision 1.1
s OpenHCI Open Host Controller Interface Specifi-
cation for USB Release 1.0a compatible
s Provides advanced power management capabili-
ties compliant with PCI Bus Power Management
Interface Specification Revision 1.1
s Fully compatible with Microsoft Windows* Stan-
dard OpenHCD Drivers
s Supports legacy keyboard and mouse devices
s Integrated dual-speed USB transceivers
s 3 V or 5 V switchable PCI signaling
s Part of Lucent USB Silicon Suite® technology fam-
ily
s 100-pin MQFP and 100-pin TQFP
s Evaluation kit available
Applications
s Seamless integration with 3 V or 5 V PCI-based
computer products
s Supports all USB compliant devices and hubs
Description
Lucent Technologies Microelectronics Group’s USS-
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.
* Microsoft and Windows are registered trademarks of Microsoft
Corporation.
Lucent Technolgies Inc.
13

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USS312 equivalent
www.DataShAMeedat4vrUca.chnomc2e00D0ata Sheet, Rev. 5
Pin Information (continued)
USS-312
Two-Port PCI-to-USB OpenHCI Host Controller
A20MN
AD2
AD1
AD0
VSS
CLK48
VDD
PMEN
PRTPWR1
PWRFLT1N
PWROK1
VDDT
DPLS1
DMNS1
PMIENABLE
VSST
VDDT
DPLS2
DMNS2
VSS
TEST0
PWROK2
PWRFLT2N
PRTPWR2
TEST1
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
TOP VIEW
75 SERRN
74 VDD
73 MIRQ12I
72 VSS
71 PERRN
70 STOPN
69 DEVSELN
68 TRDYN
67 IRDYN
66 VSS
65 VDD
64 FRAMEN
63 C/BEN2
62 AD16
61 AD17
60 VDD
59 VSS
58 AD18
57 AD19
56 AD20
55 AD21
54 VSS
53 A20I
52 AD22
51 AD23
Figure 3. Pin Diagram (100-Pin TQFP)
5-7220a.r1
Lucent Technologies Inc.
13
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Part Details

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Featured Datasheets

Part NumberDescriptionMFRS
USS312The function is 2-Port PCI-to-USB OpenHCI Host Controller. LucentLucent

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