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STUSB1602 数据表(PDF) 28 Page - STMicroelectronics |
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STUSB1602 数据表(HTML) 28 Page - STMicroelectronics |
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28 / 55 page  Start-up configuration STUSB1602 28/55 DocID028319 Rev 2 6 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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