SLOA264B April 2018 – June 2021 TAS5411-Q1 , TAS5421-Q1
For some applications, a micro-controller (MCU) is used to one or more of the facilitate devices functions through I2C bus and GPIO pins (General Purpose Input or Output). Embedded software in the MCU can program one of the GPIO pins controlling the STANDBY pin on TAS5421-Q1 and TAS5411-Q1. When I2C commands are being sent to one or more of the devices, the GPIO pin can pull STANDBY pin high prior to sending I2C transactions.
Please see TAS5421-Q1 and TAS5411-Q1 data sheets section 7.3.5 Load Diagnostics for startup timing.
The above three options clarify the usage of the STANDBY pin during I2C communications (for example, STANDBY pin is pulled high). The described usage of the STANDBY pin in the data sheet (SLOS814D) may not be obvious to the reader and it is clarified here in this application note.