SMSC USB2524 Datasheet

PRODUCT FEATURES

USB 2.0 Compatible 4-Port Hub with two upstream
host port connections
— Provides electronic reconfiguration and re-assignment
of any of its 4 downstream ports to either of two
upstream host ports ("on-the-fly").
— Allows multiple USB hosts to share peripherals and
enables a user to dynamically assign host ownership.
– Embedded Mode - 8 (predefined, OEM
programmable) configurations for port
assignment are selectable via three external
control signals.
– Peripheral Mode - Dedicated select pin for
every downstream port (total of 4), selectable
edge or level triggered in order to support a
wide range of possible switch configurations
and styles.
— Each host has a dedicated Single Transaction
Translator (Single-TT) for supporting FS/LS devices, or
can also operate in Multi-TT mode where each
downstream port has a dedicated Transaction
Translator.
Downstream ports can be disabled or defined as non-
removable
Switching hub can be configured as compound
device for support of 'embedded' USB peripherals
Multiple LED modes for maximum implementation
flexibility
— USB Mode - 2 Single-color LEDs for each downstream
port (total of 8 LEDs).
— Host Ownership Mode - 8 Single-Color LEDs indicate
which upstream host each of the downstream ports are
assigned to.
— Host Ownership & Port Speed Mode - 8 Dual-Color
LEDs are used to indicate which upstream host each of
the downstream ports are assigned to, while
simultaneously indicating downstream port connection
speed.
SMSC USB2524
USB2524
USB MultiSwitch
Enhanced configuration options available through
either a Single Serial I
Port
— VID/PID/DID
— Port Configuration
— String Descriptors (each can support a maximum length
of 31 characters)
– Custom Manufacturer String
– Custom Product String
– Custom Serial String
— Assignment of downstream ports to upstream hosts
— Switching mechanism selection
Hardware Strapping options allow for configuration
without an external EEPROM or SMBus Host
— Default VID/PID/DID, allows functionality when
configuration EEPROM is absent
Complete USB Specification 2.0 Compatibility
— Includes USB 2.0 Hi-Speed Transceivers
— High-Speed (480Mbits/s), Full-Speed (12Mbits/s) and
Low-Speed (1.5Mbits/s) compatible
— Full power management with choice of Individual or
Ganged power control
On-Board 24MHz Crystal Driver Circuit or 24 MHz
external clock driver
Internal PLL for 480MHz USB 2.0 Sampling
Internal 1.8V Linear Voltage Regulator
Integrated USB termination and Pull-up/Pull-down
resistors
Internal Short Circuit protection of USB differential
signal pins
1.8 Volt Low Power Core Operation
3.3 Volt I/O with 5V Input Tolerance
56-Pin QFN Lead-free RoHS Compliant Package
DATASHEET
TM
Hub
Datasheet
2
C EEPROM, or SMBus Slave
Revision 1.91 (08-22-07)