Data Sheet

Smart Machine Smart Decision
SIM800F_Hardware Design_V1.00 34 2015-07-31
Figure 27: RI behaviour of voice calling as a receiver
Figure 28: RI behaviour of URC or receive SMS
However, if the module is used as caller, the RI will remain high. Please refer to the following figure:
Figure 29: RI behaviour as a caller
4.8 Audio Interfaces
SIM800F provides one analog input for electronic microphone and one analog output to drive 32 receiver.
Table 12: Audio interface definition
Pin name Pin number Function
MICP 19 Audio input positive
MICN 20 Audio input negative
SPKP 21 Audio output positive
Audio
channel
SPKN 22 Audio output negative