SI7013EVB-UDP-M3L1 Datasheet, PDF (23/26 Pages) Silicon Laboratories – Si7013EVB-UDP-M3L1 Users Guide

Si7013EVB-UDP-M3L1
4.7.2.2.3. Alarm Output Pin
When a sample is taken that causes an alarm, the Data Logger firmware pulses the output pin low. The output pin
may be used to signal an external device or to sound a buzzer.
The output pin is PB0.6, which is available on the analog connector (J20). The output pin is normally 3.3 V, but,
when an alarm occurs, it goes to 0 V for 500 ms. The Data Logger firmware configures the output pin for high drive
strength, so it can sink up to 80 mA.
Note: A buzzer is not included with the evaluation kit. If you purchase a buzzer, make sure the buzzer works with 3 V and not
12 V.
Figure 27. Optional 3 V Buzzer (User Supplied)
Rev. 0.2
23