TUSB8041A Datasheet, PDF (32/57 Pages) Texas Instruments – Four-Port USB 3.1 Gen1 Hub

TUSB8041A
SLLSEW3 – AUGUST 2017
www.ti.com
8.5.19 Device Configuration Register 3
Figure 20. Register Offset 25h
Bit No.
7
6
5
4
3
2
1
0
Reset State
0
0
0
0
0
0
0
0
Table 24. Bit Descriptions – Device Configuration Register 3
Bit
Field
7:5
RSVD
4
USB2.0_only
3
Reserved
2:1
Reserved
0
FullAutoEn
0
Reserved
Type
RO
RW
RO
RO
R/W
R
Description
Reserved. Read only, returns 0 when read.
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.
Switch to reserved
Reserved
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.
8.5.20 USB 2.0 Only Port Register
Figure 21. Register Offset 26h
Bit No.
7
6
5
4
3
2
1
0
Reset State
0
0
0
0
0
0
0
0
Table 25. Bit Descriptions – USB 2.0 Only Port Register
Bit
Field
7:4
RSVD
3:0
USB2_ONLY[3:0]
Type
RO
RO/RW
Description
Reserved. Read only, returns 0 when read.
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.
7
6
5
4
3
2
1
0
Reset State
X
X
x
x
x
x
x
x
Table 26. Bit Descriptions – Serial Number Registers
Bit
Field
7:0
serialNumber[n]
Type
RO/RW
Description
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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