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RC56SP-USB Datasheet

  • RC56SP-USB

  • INTEGRATED V.90/K56FLEX MODEM DEVICE SETS WITH USB INTERFACE...

  • 14頁

  • CONEXANT   CONEXANT

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Introduction
The CONEXANT鈩?RC56D Modem Device Set supports
the USB (Universal Serial Bus), as described by the
Universal Serial Bus Specification Revision 1.0. USB
provides a flexible interconnect between a PC and a wide
range of peripherals, such as to a CONEXANT modem
device set.
The CONEXANT RC56D family devices, in conjunction
with the R8292 USB controller provide a complete USB
modem solution. The supported modem feature set for the
USB modem solution is the same as the standard RC56D
parallel host interface device set (see 鈥淩C56D and
RC336D Integrated V.90/K56flex/V.34 Modem Device Set
for Desktop Applications鈥?Data Sheet, Order No. MD211).
The modem models, which include the R8292 UCU (USB
Controller Unit in 68-PLCC), are listed in Table 1.
Features
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All features supported by the RC56D family (see data
sheet Order No. MD211)
Universal Serial Bus Specification Rev 1.0 compliant
Three function endpoint pairs with corresponding
transmit/receive FIFO pairs
Automatic transmit/receive FIFO management
USB full speed 12Mbps
USB low speed 1.5Mbps
Reset separation
Four LED driver outputs
On-chip phase-locked loop (PLL)
On-chip USB transceivers
256 bytes on-chip Data RAM
Suspend/Resume
Vendor specific descriptors
Windows 98 support
Windows 95 OSR 2.1 support
Extension pickup/remote hang-up detection
Line-in-use detection
Hardware
A complete accelerator kit implementing the USB solution
is offered as 鈥淧erth鈥?(AK56-D540). This design consists of
the RC56D parallel host interface device set and the
R8292 USB Controller Unit (UCU). The R8292 operates
with a 12 MHz crystal. A 32K x 8, 150 ns EEPROM is
required for USB controller firmware. Additionally, one
latch, one transistor, and two bus transceivers are
required.
The R8292 USB Controller is based on the MCS 51
microcontroller. It is a hubless USB peripheral controller
that supports suspend/resume modes and
isochronous/non-isochronous transfers.
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Firmware
Firmware for the R8292 controller is provided in object
form, however, vendor specific descriptors can be
customized with a supplied utility. Vendor ID, Product ID,
Device Release Number, Manufacturer Name, Product
Name, and Serial Number can all be modified.
Drivers
A complete set of software drivers is provided for
Windows 98 and Windows 95 OSR 2.1 support. Sample
INF files are also provided.
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