Datasheet
TUSB8040A
www.ti.com
SLLSEA7F –MAY 2012–REVISED SEPTEMBER 2013
Contents
1 PRODUCT OVERVIEW ......................................................................................................... 5
1.1 Features ...................................................................................................................... 5
1.2 Applications .................................................................................................................. 6
1.3 Introduction .................................................................................................................. 6
1.4 Functional Description ...................................................................................................... 7
2 PIN DESCRIPTIONS ............................................................................................................. 8
2.1 Signal Descriptions ......................................................................................................... 9
2.2 Clock and Reset Signals ................................................................................................... 9
2.3 USB Upstream Signals ..................................................................................................... 9
2.4 USB Downstream Signals ................................................................................................ 10
2.5 I
2
C/SMBUS Signals ....................................................................................................... 13
2.6 Test and Miscellaneous Signals ......................................................................................... 14
2.7 Power Signals .............................................................................................................. 16
3 FUNCTIONAL DESCRIPTION ............................................................................................... 17
3.1 TUSB8040A Register Map ............................................................................................... 17
3.2 I
2
C EEPROM Operation .................................................................................................. 17
3.3 SMBus Slave Operation .................................................................................................. 18
3.4 Configuration Registers ................................................................................................... 18
3.4.1 ROM Signature Register ....................................................................................... 18
3.4.2 Vendor ID LSB Register ....................................................................................... 18
3.4.3 Vendor ID MSB Register ...................................................................................... 19
3.4.4 Product ID LSB Register ....................................................................................... 19
3.4.5 Product ID MSB Register ...................................................................................... 19
3.4.6 Device Configuration Register ................................................................................ 20
3.4.7 Battery Charging Support Register ........................................................................... 21
3.4.8 Device Removable Configuration Register .................................................................. 21
3.4.9 Port Used Configuration Register ............................................................................ 22
3.4.10 Language ID LSB Register .................................................................................... 22
3.4.11 Language ID MSB Register ................................................................................... 22
3.4.12 Serial Number String Length Register ....................................................................... 23
3.4.13 Manufacturer String Length Register ........................................................................ 23
3.4.14 Product String Length Register ............................................................................... 23
3.4.15 Serial Number Registers ....................................................................................... 24
3.4.16 Manufacturer String Registers ................................................................................ 24
3.4.17 Product String Registers ....................................................................................... 24
3.4.18 Device Status and Command Register ...................................................................... 25
4 CLOCK GENERATION ........................................................................................................ 26
4.1 Crystal Requirements ..................................................................................................... 26
4.2 Input Clock Requirements ................................................................................................ 26
5 POWER UP AND RESET ..................................................................................................... 27
6 ELECTRICAL SPECIFICATIONS .......................................................................................... 28
6.1 Absolute Maximum Ratings .............................................................................................. 28
6.2 Recommended Operating Conditions .................................................................................. 28
6.3 Thermal Information ....................................................................................................... 29
6.4 3.3-V I/O Electrical Characteristics ...................................................................................... 29
6.5 Hub Input Supply Current ................................................................................................ 30
2 Contents Copyright © 2012–2013, Texas Instruments Incorporated