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STUSB1600 数据表(PDF) 42 Page - STMicroelectronics |
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STUSB1600 数据表(HTML) 42 Page - STMicroelectronics |
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42 / 69 page  Start-up configuration STUSB1600 42/69 DocID028937 Rev 1 6 Start-up configuration 6.1 User-defined parameters The STUSB1600 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 (see Section 5.1: Register description). The NVM re-programming is possible with a customer password. When a default value is changed during functioning by software, the new setting remains in effect as long as the STUSB1600 is operating or when it is changed again. But after power- off and power-up, or after a reset, the STUSB1600 takes back the default values defined in the NVM. Please refer to the NVM access and programming application note in order to read and change the default values of the parameters customizable by the NVM if needed. 6.2 Default start-up configuration The table below lists the user-defined parameters and indicates the default start-up configuration of the STUSB1600. 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 37. STUSB1600 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 |
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