TUSB422 datasheet(38/71 Pages) TI1

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TUSB422

SLLSEW6 – NOVEMBER 2016

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7.6.26 Power Status Register (address = 0x1E) [reset = 0x00]

Figure 34. Power Status Register

DEBUG_ACC_

CONNECTED

TCPC_INIT_ST

ATUS

SOURCING_HI

GH_VOLTAGE

SOURCING_V

BUS

VBUS_PRES_

DETECT_ENA

BLED

VBUS_PRESE

VCONN_PRES

ENT

SINKING_VBU

LEGEND: R/W = Read/Write; R = Read only

Table 31. Power Status Register Descriptions

Bit

Field

Type

Reset

Description

DEBUG_ACC_CONNECTED

0b: No Debug Accessory connected (default)

1b: Debug Accessory connected

Reflects the state of the DebugAccessoryConnected# output if

supported. Even though the TUSB422 doesn’t have a debug

accessory pin, TUSB422will set this flag to 1 if a debug

accessory is detected.

TCPC_INIT_STATUS

0b: The TUSB422 has completed initialization and all registers

are valid.

1b: The TUSB422 is still performing internal initialization and the

only registers that are guaranteed to return the correct values

are 00h..0Fh.

The TUSB422 will never set this flag so software needs to be

aware at power-up one reason for INT_N assertion is TUSB422

has completed its initialization.

SOURCING_HIGH_VOLTAGE

0b: vSafe5V

1b: High Voltage

This does not control the path, just provides a monitor of the

status. Assert as long as supplying voltage greater than

vSafe5V.

SOURCING_VBUS

0b: Sourcing VBUS is disabled

1b: Sourcing VBUS is enabled

This does not control the path, just provides a monitor of the

status.

VBUS_PRES_DETECT_ENABLED

0b: VBUS Present Detection Disabled (Default)

1b: VBUS Present Detection Enabled

Indicates if the TUSB422 is monitoring for VBUS Present or if

the circuit has been powered off

VBUS_PRESENT

0b: VBUS Disconnected

1b: VBUS Connected

The TUSB422 shall report VBUS present when TUSB422

detects VBUS rises above 4 V. The TUSB422 shall report VBUS

is not present when TUSB422 detects VBUS falls below 3.5 V.

The TUSB422 may report VBUS is not present if VBUS is

between 3.5 V and 4 V. When this field transitions from 1 to 0,

VBUS Sink Disconnect Threshold field is all zeros, and Auto

Discharge is enabled, the TUSB422 will discharge to vSafe0V.

VCONN_PRESENT

0b: VCONN is not present

1b: This bit is asserted when VCONN present CC1 or CC2.

Threshold is fixed at 2.4 V

SINKING_VBUS

0b: Sink is Disconnected

1b: TUSB422 is sinking VBUS to the system load

TUSB422 Datasheet(PDF) 38 Page - Texas Instruments

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