TUSB8040

SLLSE42C – SEPTEMBER 2010 – REVISED FEBRUARY 2011

www.ti.com

Table 3-13. Bit Descriptions – Device Configuration Register (continued)

BIT

FIELD NAME

ACCESS

DESCRIPTION

u1u2Disable

RW

U1 U2 Disable

When this bit is set, the TUSB8040 will not initiate or accept any U1 or U2 requests on any

port, upstream or downstream, unless it receives or sends a Force_LinkPM_Accept LMP

command. After receiving or sending a FLPMA LMP command, the TUSB8040 will

continue to enable U1 or U2 until it gets a power on reset or is disconnected on its

5

upstream port.

This bit is loaded at the deassertion of reset with the value of the SDA_SMDAT terminal.

EEPROM.

When the TUSB8040 is in SMBUS mode, the value may be over-written by a SMBUS host.

4

portIndz

R

Port Indicator Status. This bit is always 1.

3

ganged

R

Ganged. This bit is always 1.

fullPwrMgmtz

RW

Full Power Management. This bit is loaded at the de-assertion of reset with the value of the

FULLPWRMGMTz_SMBA1 terminal.

2

EEPROM.

When the TUSB8040 is in SMBUS mode, the value may be over-written by an SMBus host.

1:0

RSVD

RO

Reserved. This field is reserved and returns 0 when read.

3.3.7

Battery Charging Support Register

Table 3-14. Register Offset 6h

BIT NO.

7

6

5

4

3

2

1

0

RESET STATE

0

0

0

0

X

X

X

X

Table 3-15. Bit Descriptions – Battery Charging Support Register

BIT

FIELD NAME

ACCESS

DESCRIPTION

7:4

RSVD

RO

Reserved. Read only, returns 0 when read.

Battery Charger Support.

The bits in this field indicate whether the downstream port implements the charging port

features. A value of 0 indicates the port does not implement the charging port features. A

value of 1 indicates the port does support the charging port features.

Each bit corresponds directly to a downstream port, i.e. batEn0 corresponds to downstream

port 0 (physical port 1).

3:0

batEn[3:0]

RW

The default value for these bits are loaded at the de-assertion of reset with the value of the

PWRON0z_BATEN0 for all ports enabled in the configuration:

Four-port hub - bateEn[3:0] defaults to wxyzb,

where w, x, y and z are the value of PWRON0z_BATEN0 when reset is de-asserted.

used[3:0] may be over-written by EEPROM contents or by an SMBus host.

3.3.8

Device Removable Configuration Register

Table 3-16. Register Offset 7h

BIT NO.

7

6

5

4

3

2

1

0

RESET STATE

0

0

0

0

0

0

0

0

16

FUNCTIONAL DESCRIPTION

Copyright © 2010–2011, Texas Instruments Incorporated

Submit Documentation Feedback

Product Folder Link(s): TUSB8040