SLAAEC6A October 2023 – January 2024
GPIO1 has many configuration options through the J41 header, but only one setting is allowed at a time. GPIO1 can be configured for general-purpose input-output, a Serial Peripheral Interface (SPI), data for POCI (Peripheral Output Controller Input), a PDM/Digital MIC, or a second audio serial interface (ASI2). GPIO1 can be configured as the Digital Microphone Clock or Data for digital microphone applications. For the Audio Serial Interface, GPIO1 can be configured as either the WCLK, BCLK, DIN, or DOUT in the controller or peripheral mode, as shown in Figure 3-20.