Circuit diagrams and other information relating to SMSC products are included as a means of illustrating typical applications. Consequently, complete information sufficient for
construction purposes is not necessarily given. Although the information has been checked and is believed to be accurate, no responsibility is assumed for inaccuracies. SMSC
reserves the right to make changes to specifications and product descriptions at any time without notice. Contact your local SMSC sales office to obtain the latest specifications
before placing your product order. The provision of this information does not convey to the purchaser of the described semiconductor devices any licenses under any patent
rights or other intellectual property rights of SMSC or others. All sales are expressly conditional on your agreement to the terms and conditions of the most recently dated
version of SMSC's standard Terms of Sale Agreement dated before the date of your order (the "Terms of Sale Agreement"). The product may contain design defects or errors
known as anomalies which may cause the product's functions to deviate from published specifications. Anomaly sheets are available upon request. SMSC products are not
designed, intended, authorized or warranted for use in any life support or other application where product failure could cause or contribute to personal injury or severe property
damage. Any and all such uses without prior written approval of an Officer of SMSC and further testing and/or modification will be fully at the risk of the customer. Copies of
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Revision 2.1 (06-02-10)
PRODUCT PREVIEW
2
SMSC USB3318 REV
C
Hi-Speed USB Transceiver with 1.8V-3.3V ULPI Interface - 13MHz Reference Clock
General Description
The USB3318 is a highly integrated Hi-Speed USB 2.0 Transceiver (PHY) that supports systems
architectures based on a 13MHz reference clock. It is designed to be used in both commercial and
industrial temperature applications.
The USB3318 meets all of the electrical requirements to be used as a Hi-Speed USB Host, Device,
or an On-the-Go (OTG) device. In addition to the supporting USB signaling the USB3318 also provides
USB UART mode.
USB3318 uses the industry standard UTMI+ Low Pin Interface (ULPI) to connect the USB PHY to the
Link. The industry standard ULPI interface uses a method of in-band signaling and status byte transfers
between the Link and PHY, to facilitate a USB session. By using in-band signaling and status byte
transfers the ULPI interface requires only 12 pins.
The USB3318 uses SMSC’s “wrapper-less” technology to implement the ULPI interface. This “wrapper-
less” technology allows the PHY to achieve a low latency transmit and receive time. SMSC’s low
latency transceiver allows an existing UTMI Link to be reused by adding a UTMI to ULPI bridge. By
adding a bridge to the ASIC the existing and proven UTMI Link IP can be reused.
REFCLK
CPEN
ESD Protection
VBUS
ID
OTG
Low Jitter
Integrated
PLL
BIAS
RBIAS
DP
DM
Hi-Speed
USB
Transceiver
ULPI
Registers
and State
Machine
Integrated
Power
Management
RESETB
VBAT
VDD33
VDD18
VDDIO
Carkit
ULPI Interface
STP
NXT
DIR
CLKOUT
DATA[7:0]
Figure 1 USB3318 Block Diagram
The USB3318 is designed to run with a 13MHz reference clock. By using a reference clock from the
Link the USB3318 is able to remove the cost of a crystal reference from the design.
The USB3318 includes a integrated 3.3V LDO regulator to generate its own supply from power applied
at the
VBAT
pin. The voltage on the
VBAT
pin can range from 3.1 to 5.5V. The regulator dropout
voltage is less than 100mV which allows the PHY to continue USB signaling when the voltage on
VBAT
drops to 3.1V. The USB transceiver will continue to operate at lower voltages, although some
parameters may be outside the limits of the USB specifications. If the user would like to provide a 3.3V
supply to the USB3318, the
VBAT
and
VDD33
pins should be connected together.
The USB3318 also includes integrated pull-up resistors that can be used for detecting the attachment
of a USB Charger. By sensing the attachment to a USB Charger, a product using the USB3318 can
charge its battery at more than the 500mA allowed when charging from a USB Host.
SMSC USB3318 REV
C
PRODUCT PREVIEW
3
Revision 2.1 (06-02-10)
Hi-Speed USB Transceiver with 1.8V-3.3V ULPI Interface - 13MHz Reference Clock
Package Outline
Revision 2.1 (06-02-10)
PRODUCT PREVIEW
4
SMSC USB3318 REV
C
Figure 2 24-Pin QFN, 4x4mm Body, 0.5mm Pitch
Mouser Electronics
Authorized Distributor
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