TUSB4041IPAPRQ1 datasheet(19/44 Pages) TI1

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TUSB4041I-Q1

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SLLSEK4B – JULY 2015 – REVISED JANUARY 2016

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8.5.9 Device Removable Configuration Register

Offset = 7h

Figure 10. Device Removable Configuration Register

customRmbl

RSVD

rmbl[3:0]

RW-0

R-0

RW-X

Table 11. Device Removable Configuration Register Field Descriptions

Bit

Field

Type

Reset

Description

customRmbl

Custom removable

This bit controls the ability to write to the port removable bits.

0 = rmbl[3:0] are read only, and the values are loaded from the OTP ROM.

1 = rmbl[3:0] are R/W and can be loaded by EEPROM or written by SMBus.

This bit may be written simultaneously with rmbl[3:0].

6:4

RSVD

Reserved

Read only, returns 0 when read

3:0

rmbl[3:0]

Removable

The bits in this field indicate whether a device attached to downstream ports 4

through 1 are removable or permanently attached.

0 = The device attached to the port is not removable.

1 = The device attached to the port is removable.

Each bit corresponds directly to a downstream port n + 1, For example: rmbl0

corresponds to downstream port 1, rmbl1 corresponds to downstream port 2, and

so on.

This field is read only unless the customRmbl bit is set to 1. Otherwise, the value of

this field reflects the inverted values of the OTP ROM non_rmb[3:0] field.

8.5.10 Port Used Configuration Register

Offset = 8h

Figure 11. Port Used Configuration Register

RSVD

used[3:0]

R-0

RW-1

Table 12. Port Used Configuration Register Field Descriptions

Bit

Field

Type

Reset

Description

7:4

RSVD

Reserved

Read only

3:0

used[3:0]

Used

The bits in this field indicate whether a port is enabled.

0 = The port is disabled.

1 = The port is enabled.

Each bit corresponds directly to a downstream port. For example: used0 corresponds

to downstream port 1, used1 corresponds to downstream port 2, and so on. All

combinations are supported with the exception of both ports 1 and 3 marked as

disabled.

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