SLOS602E September 2008 – September 2019 TLV320AIC3204
Only a small number of digital pins are dedicated to a single function; whenever possible, the digital pins have a default function, and also can be reprogrammed to cover alternative functions for various applications.
The fixed-function pins are Reset, LDO_Select and the SPI_Select pin, which are HW control pins. Depending on the state of SPI_Select, the two control-bus pins SCL/SS and SDA/MOSI are configured for either I2C or SPI protocol.
Other digital IO pins can be configured for various functions via register control. An overview of available functionality is given in Multifunction Pins.