SLAU902A September 2023 – January 2024
GPIO1 has many configuration options through J41 header, but only one setting is allowed at a time. GPIO1 can be configured for general purpose input output, a PDM/Digital MIC or a second audio serial interface (ASI2). For Digital Microphone application, GPIO1 can be configured as the Digital Microphone Clock or Data and for Audio Serial Interface. GPIO1 can be configured as either the WCLK, BCLK, DIN or DOUT in controller or target mode. In controller mode, GPIO1 can be configured to receive MCLK as well. This is shown in the figure below.