6

Start-up configuration

6.1

User-defined parameters

The STUSB1602 has a set of user-defined parameters that can be customized by NVM reprogramming and/or by

software through the I²C interface. This feature allows the customer to change the preset configuration of the USB

Type-C interface and to define a new configuration to meet specific customer requirements addressing various

applications, use cases, or specific implementations.

The NVM re-programming overrides the initial default setting to define a new default setting that is used at

power-up or after a reset. The default value is copied at power-up, or after a reset, from the embedded NVM into

dedicated I²C register bits. The NVM re-programming is possible only once with a customer password.

When a default value is changed during functioning by software, the new setting remains in effect as long as

the STUSB1602 runs or when it is changed again. But after power- off and power-up, or after a reset, the

STUSB1602 takes back the default values defined in the NVM.

6.2

Default start-up configuration

The table below lists the user-defined parameters and indicates the default start-up configuration of the

STUSB1602.

Three types of user-defined parameters are specified in the table with respect to the “Customization type” column:

•

SW: indicates parameters that can be customized only by software through the I²C interface during system

operation

•

NVM: indicates parameters that can be customized only by NVM re-programming

•

NVM/SW: indicates parameters that can be customized by NVM re-programming and/or by software through

the I²C interface during system operation

Customization type

Parameter

Default value and description

I²Cregister

address

NVM/SW

CC_CONNECTION_STATUS_AL_MASK

1b: interrupt masked

0Ch

NVM/SW

MONITORING_STATUS_AL_MASK

1b: interrupt masked

0Ch

NVM/SW

HW_FAULT_STATUS_AL_MASK

1b: interrupt masked

0Ch

NVM

STANDBY_POWER_MODE_DISABLE

1b: disables standby power mode

n.a.

NVM/SW

CC_POWER_MODE

011b: dual power role with accessory

support

28h

NVM/SW

CC_CURRENT_ADVERTISED

01b: 1.5 A

18h

NVM/SW

CC_VCONN_DISCHARGE_EN

18h

NVM/SW

CC_VCONN_SUPPLY_EN

CC pin

18h

NVM/SW

CC_VCONN_SWITCH_ILIM

0000b: 350 mA

1Eh

SW

VCONN_MONITORING_EN

1b: enables UVLO threshold detection on

VCONN pin

20h

SW

VCONN_UVLO_THRESHOLD

0b: high UVLO threshold of 4.65 V

20h

NVM/SW

SHIFT_HIGH_VBUS_LIMIT_SOURCE

0101b: in source power role, shifts

22h

NVM/SW

SHIFT_LOW_VBUS_LIMIT_SOURCE

0101b: in source power role, shifts

22h

STUSB1602

Start-up configuration

DS11254 - Rev 5

page 20/39