HD3SS3220RNHT datasheet(21/43 Pages) TI1

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HD3SS3220

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SLLSES1 – DECEMBER 2015

7.6.3 Connection Status and Control Register (offset = 0x09) [reset = 0x20]

Figure 7. Connection Status and Control Register

ATTACHED_STATE

CABLE_DIR

INTERRUPT

VCONN

DRP_DUTY_CYCLE

DISABLE

_STATUS

_FAULT

_UFP_

ACCESSORY

R/U

R/W

LEGEND: R/W = Read/Write; R = Read only; -n = value after reset, R/U = Read/Update

Table 9. Connection Status Register Field Descriptions

Bit

Field

Type

Reset

Description

7:6

ATTACHED_STATE

R/U

2’b00

This is an additional method to communicate attach other than

the ID pin. These bits can be read by the application to

determine what was attached.

00 – Not Attached (Default)

01 – Attached.SRC (DFP)

10 – Attached.SNK (UFP)

11 – Attached to an Accessory

CABLE_DIR

R/U

1’b0

Cable orientation. The application can read these bits for cable

orientation information.

0 – CC2

1 – CC1 (Default)

INTERRUPT _STATUS

R/U

1’b0

The INT pin will be pulled low whenever a CSR changes. When

a CSR change has occurred this bit should be held at 1 until the

application clears teh bit.

0 – Clear 1 – Interrupt (When INT pulled low, this bit must be

1. This bit will be 1 whenever any CSR have been changed)

VCONN _FAULT

R/U

1’b0

Bit is set whenever VCONN overcurrent limit is triggered.

0 – Clear

1 – VCONN fault is detected

2:1

DRP_DUTY_CYCLE

R/W

2’b00

Percentage of time that a DRP shall advertise DFP during tDRP

00 – 30% default

01 – 40%

10 – 50%

11 – 60%

DISABLE _UFP_ ACCESSORY

R/W

1’b0

Setting this field will disable UFP accessory support

0 – UFP accessory support enabled (Default)

1 – UFP accessory support disabled

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