9.2.3.2.1 Startup Procedures- Software Control Mode
- Configure all digital I/O pins as required by the application using PCB connections (that is SPK_GAIN[1:0] = 11, ADR, etc.)
- Start with SPK_SD Pin = LOW
- Bring up power supplies (it does not matter if PVDD/AVDD or DVDD comes up first, provided the device is held in shutdown.)
- Once power supplies are stable, start MCLK, SCLK, LRCK
- Configure the device via the control port in the manner required by the use case, making sure to mute the device via the control port
- Once power supplies and clocks are stable and the control port has been programmed, bring SPK_SD HIGH
- Unmute the device via the control port
- The device is now in normal operation
NOTE
Control port register changes should only occur when the device is placed into shutdown. This can be accomplished either by pulling the SPK_SD pin LOW or clearing the SPK_SD bit in the control port.