TUSB8041A datasheet(32/57 Pages) TI1

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TUSB8041A

SLLSEW3 – AUGUST 2017

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8.5.19 Device Configuration Register 3

Figure 20. Register Offset 25h

Bit No.

Reset State

Table 24. Bit Descriptions – Device Configuration Register 3

Bit

Field

Type

Description

7:5

RSVD

Reserved. Read only, returns 0 when read.

USB2.0_only

USB 2.0 hub reports as 2.0 only. This bit disables the USB 2.0 hub

from reporting 5Gbps support in the wSpeedsSupported field of the

USB SS BOS SS device capability descriptor. This bit will also disable

the USB3.0 hub.

This bit is read/write but the read value returned is the Boolean OR of

this bit and the corresponding eFuse bit. If either bit is set, this feature

is enabled.

Reserved

Switch to reserved

2:1

Reserved

FullAutoEn

R/W

Enable all divider battery charging modes. When automode is enabled

and this bit is set, any DS port enabled for battery charging will attempt

all divider battery charging modes before DCP, starting with the

highest current option.

The bit is writable, but the value read back is the Boolean OR of this

bit and the corresponding eFuse control.

If either bit is set, eFuse or this register, this feature is enabled.

Reserved

Reserved.

8.5.20 USB 2.0 Only Port Register

Figure 21. Register Offset 26h

Bit No.

Reset State

Table 25. Bit Descriptions – USB 2.0 Only Port Register

Bit

Field

Type

Description

7:4

RSVD

Reserved. Read only, returns 0 when read.

3:0

USB2_ONLY[3:0]

RO/RW

USB 2.0 Only Ports. The bits in this field primarily indicate whether a

port is enabled only for USB 2.0 operation. This field is read-only

unless customRmbl bit is set. Also, these bits will override the

corresponding USED bit.

A value of 0 indicates the hub port is enabled for both USB 3.1 and

USB 2.0.

A value of 1 indicates the hub port is enabled only for USB 2.0

operation.

8.5.21 Serial Number String Registers

Figure 22. Register Offset 30h-4Fh

Bit No.

Reset State

Table 26. Bit Descriptions – Serial Number Registers

Bit

Field

Type

Description

7:0

serialNumber[n]

RO/RW

Serial Number byte N. The serial number returned in the Serial

Number string descriptor at string index 1. The default value of these

registers is assigned by TI. When customSernum is 1, these registers

may be over-written by EEPROM contents or by an SMBus host.

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