Not Recommended for New Designs

TUSB8040

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SLLSE42I – SEPTEMBER 2010 – REVISED SEPTEMBER 2013

3

FUNCTIONAL DESCRIPTION

Table 3-1. TUSB8040 Register Map

BYTE ADDRESS

CONTENTS

00h

ROM Signature (55h)

01h

Vendor ID LSB

02h

Vendor ID MSB

03h

Product ID LSB

04h

Product ID MSB

05h

Device Configuration Register

06h

Battery Charging Support Register

07h

Device Removable Configuration Register

08h

Port Used Configuration Register

09h-0Fh

Reserved

10h-1Fh

Reserved

20h-21h

LangID Byte [1:0]

22h

Serial Number String Length

23h

Manufacturer String Length

24h

Product String Length

25h-2Fh

Reserved

30h-4Fh

Serial Number String Byte [31:0]

50h-8Fh

Manufacturer String Byte [63:0]

90h-CFh

Product String Byte [63:0]

D0-F7h

Reserved

F8h

Device Status and Command Register

F9-FFh

Reserved

3.1

I

EEPROM at bus address 1010000b using 7-bit addressing starting at address 0. If the value of the

EEPROM contents at byte 00h equals 55h, the TUSB8040 loads the configuration registers according to

with the default values in the configuration registers. The hub will not connect on the upstream port until

the configuration is completed.

Note, the bytes located below offset 9h are optional. The requirement for data in those addresses is

dependent on the options configured in the Device Configuration and Phy Custom Configuration registers.

3.2

SMBus Slave Operation

When the SMBus interface mode is enabled, the TUSB8040 supports read block and write block protocols

as a slave-only SMBus device.

The supported slave address of 1000 11xy for the TUSB8040PFP is:

•

x is the state of FULLPWRMGMTz_SMBA1 at reset, and

•

y indicates read (logic 1) or write (logic 0) access.

If the TUSB8040 is addressed by a host using an unsupported protocol it will not respond. The TUSB8040

will wait indefinitely for configuration by the SMBus host and will not connect on the upstream port until the

SMBus host indicates configuration is complete by clearing the CFG_ACTIVE bit.

Copyright © 2010–2013, Texas Instruments Incorporated

FUNCTIONAL DESCRIPTION

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