The event is called when the device needs all hardware interrupts to be disabled. Such a moment occurs at Reset, Restart, LoadCode, Run RFPGM, Remove bond, Factory Settings, and Validate bonds (when [N] is restarted) commands as all of them cause the device to reset or restart.
Example
case DpaEvent_DisableInterrupts:
// ADC Interrupt Enable - off
ADIE = 0;
return Carry;
☼ See example code CustomDpaHandler-Timer.c for more details.