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PDF USB2502 Data sheet ( Hoja de datos )
| Número de pieza | USB2502 | |
| Descripción | 2-Port USB 2.0 Hub Controller | |
| Fabricantes | SMSC Corporation | |
| Logotipo |  |
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USB2502
2-Port USB 2.0 Hub
Controller
PRODUCT FEATURES
Integrated USB 2.0 Compatible 2-Port Hub
— High-Speed (480Mbits/s), Full-Speed (12Mbits/s) and
Low-Speed (1.5Mbits/s) compatible
— Full power management with ganged power control
— Detects Bus-Power/Self-Power source and changes
mode automatically
Complete USB Specification 2.0 Compatibility
— Includes USB 2.0 Transceivers
VID/PID/DID, and Port Configuration for Hub via:
— Single Serial I2C EEPROM
— SMBus Slave Port
Default VID/PID/DID, allows functionality when
configuration EEPROM is absent
Hardware Strapping options allow for configuration
without an external EEPROM or SMBus Host
Datasheet
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
Basic single-color LED support
1.8 Volt Low Power Core Operation
3.3 Volt I/O with 5V Input Tolerance
36 Pin QFN or 48 Pin TQFP lead-free RoHS
compliant package
SMSC USB2502
DATASHEET
Revision 2.1 (12-06-06)
1 page  
2-Port USB 2.0 Hub Controller
Datasheet
List of Figures
Figure 3.1
Figure 3.2
Figure 4.1
Figure 5.1
Figure 5.2
Figure 5.3
Figure 5.4
Figure 9.1
Figure 9.2
2-Port 36-Pin QFN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2-Port 48-Pin TQFP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2-Port Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
LED Strapping Option . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Reset_N Timing for Default/Strap Option Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Reset_N Timing for EEPROM Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Reset_N Timing for SMBus Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
36 Pin QFN Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
48 Pin TQFP Package Outline (7x7x1.4 mm body, 2mm Footprint) . . . . . . . . . . . . . . . . . . . 44
SMSC USB2502
5
DATASHEET
Revision 2.1 (12-06-06)
5 Page 
2-Port USB 2.0 Hub Controller
Datasheet
Chapter 4 2-Port Hub Block Diagram
8SVWUHDP
VBUS
Upstream
USB Data
24 MHz
Crystal
3.3V
Bus-Power Upstream
'HWHFW
PHY
PLL
1.8V Reg
Repeater
SIE
To EEPROM or
SMBus Master
1.8V
SD SCK
Serial
Interface
Controller
Transaction Translator
Port
Controller
Routing Logic
Downstream PHY #1
OC Sense
Switch Driver
LED Driver
Strapping Options
Downstream PHY #2
Downstream
USB Data
OC
Sense
Switch/LED
Driver/optís
Downstream
USB Data
Figure 4.1 2-Port Block Diagram
NAME
USB Bus Data
Detect Upstream
VBUS Power
Table 4.1 2-Port Hub Pin Descriptions
SYMBOL
TYPE
FUNCTION
USBDN0
USBDP0
VBUS_DET
UPSTREAM USB 2.0 INTERFACE
IO-U
These pins connect to the upstream USB bus data signals.
I/O8 Detects state of Upstream VBUS power. The SMSC Hub
monitors VBUS_DET to determine when to assert the
internal D+ pull-up resistor (signalling a connect event).
When designing a detachable hub, this pin must be
connected to the VBUS power pin of the USB port that is
upstream of the hub. (Use of a weak pull-down resistor is
recommended.)
For self-powered applications with a permanently attached
host, this pin must be pulled-up to either 3.3V or 5.0V
(typically VDD33).
SMSC USB2502
11
DATASHEET
Revision 2.1 (12-06-06)
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet USB2502.PDF ] | |
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