10.3.10.2 WARN

This active-low output pin reports audio clipping, overtemperature warnings, and POR events.

Clipping is reported if any channel is at the maximum modulation for 20 consecutive PWM clocks which results in a 10-µs delay to report the onset of clipping. The warning bit is sticky and can be cleared by the CLEAR FAULT bit (bit 7) in register 0x21.

An overtemperature warning (OTW) is reported if the general temperature or any of the channel temperature warnings are set. The warning temperature can be set through bits 5 and 6 in register 0x01.

Register bits are available to mask either clipping or OTW reporting to the pin. These bits only mask the setting of the pin and do not affect the register reporting. By default both clipping and OTW are reported.

The WARN pin is latched and can be cleared by writing the CLEAR FAULT bit (bit 7) in register 0x21.

This pin is an open-drain output with an internal 100 kΩ pullup resistor to VDD.