20H04 Datasheet, PDF (6/38 Pages) SMSC Corporation – 4-PORT USB2.0 HUB CONTROLLER

Table of Contents
4-Port USB2.0 Hub Controller
Datasheet
USB20H04 Datasheet Revisions................................................................................................................. 3
Chapter 1 General Description ............................................................................................................. 8
1.1 Applications ......................................................................................................................................... 8
1.2 OEM Selectable Features ................................................................................................................... 9
1.3 Pin Selectable Options to the Default Configuration........................................................................... 9
Chapter 2 Functional Block Diagram ................................................................................................ 10
Chapter 3 Pinout .................................................................................................................................. 11
Chapter 4 Interface Signal Definition ................................................................................................ 12
4.1 Pin Descriptions ................................................................................................................................ 12
4.2 Buffer Type Descriptions ................................................................................................................... 14
Chapter 5 Limiting Values .................................................................................................................. 15
Chapter 6 Electrical Characteristics .................................................................................................. 16
6.1 Dynamic Characteristics: Analog I/O Pins (DP/DM) ......................................................................... 18
Chapter 7 Functional Overview.......................................................................................................... 19
7.1 Bus-Power Detect ............................................................................................................................. 19
7.2 Upstream PHY .................................................................................................................................. 19
7.3 Clock/PLL .......................................................................................................................................... 19
7.4 Internal Configuration Select............................................................................................................. 19
7.5 Serial Interface .................................................................................................................................. 20
7.5.1 SMBus Slave ..........................................................................................................................................20
7.5.2 I²C Memory Interface ..............................................................................................................................20
7.6 Repeater............................................................................................................................................ 20
7.7 SIE..................................................................................................................................................... 20
7.8 Controller ........................................................................................................................................... 20
7.9 Transaction Translator (TT) .............................................................................................................. 21
7.10 Port Controller ................................................................................................................................ 21
7.11 Downstream PHY........................................................................................................................... 21
7.12 OC Sense/Switch Driver ................................................................................................................ 21
7.12.1 Over-Current Sense ............................................................................................................................21
7.12.2 Switch Driver .......................................................................................................................................21
7.13 LED Drivers.................................................................................................................................... 21
Chapter 8 Implementation Notes........................................................................................................ 23
8.1 Configuration Implementations ......................................................................................................... 23
8.1.1 Interfacing a 2-wire Serial EEPROM.......................................................................................................23
8.1.2 Internal Default Configuration .................................................................................................................24
8.2 EEPROM Programming Values ........................................................................................................ 24
8.3 Default Configuration Values ............................................................................................................ 26
8.4 Reset ................................................................................................................................................. 27
8.4.1 External Hardware Reset........................................................................................................................27
8.4.2 USB Reset ..............................................................................................................................................30
Chapter 9 Hub Descriptors ................................................................................................................. 31
Chapter 10 Application Diagrams..................................................................................................... 36
Chapter 11 Package Outline .............................................................................................................. 38
Revision 1.63 (10-14-04)
Page 6
DATASHEET
SMSC USB20H04