STUSB1602 datasheet(28/55 Pages) STMICROELECTRONICS

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Start-up configuration

STUSB1602

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DocID028319 Rev 2

Start-up configuration

6.1

User-defined parameters

The STUSB1602 has a set of user-defined parameters that can be customized by NVM re-

programming 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 is operating 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.

Table 17. STUSB1602 user-defined parameters and default setting

Customization

type

Parameter

Default value and description

I2C register

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_CURRENT_ADVERTISED

00b: default USB current, 500 mA or

900 mA

18h

NVM/SW

CC_VCONN_DISCHARGE_EN

0b: VCONN discharge disabled on

CC pin

18h

NVM/SW

CC_VCONN_SUPPLY_EN

1b: VCONN supply capability enabled

on CC pin

18h

NVM/SW

CC_VCONN_SWITCH_ILIM

0000b: 350 mA

1Eh

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