TDA7501_07 Datasheet, PDF (16/29 Pages) STMicroelectronics – Line driver for digital car radio Signal processor (DSPLD)

Digital interface
6
Digital interface
TDA7501
The TDA7501 digital interface offers two different protocols: SPI and I2C.
To select I2C-mode the SEL-pin has to beconnected to VDD. If the voltage at the SEL-pin is
more than about 1V below the VDD voltage the interface switches to SPI-mode.
In both cases the interface is able to work with a 3.3V microprocessor as well as with a 5V
microprocessor. For details of both protocols refer to the programming section.
16/29