Garmin GMA 35 Installation Manual page 45

Pin Name
PA MUTE SELECTED* OUT
An active low output that has low-impedance to ground when PA mode is selected.
Pin Name
COM SWAP/CYCLE* IN
COM SWAP is used to toggle between COM1 MIC and COM2 MIC for installations with two COM
radios.
CYCLE* IN is used to cycle between COM1 MIC, COM2 MIC, and COM3 MIC for installations with
three COM radios.
Pin Name
PLAY KEY* IN
An active low input that allows a remote pushbutton to initiate playback of recorded COM audio.
190-00858-11
Rev. H
Table 4-21. PA Mode
Table 4-22. COM Swap/Cycle
Table 4-23. Play Key
Connector Pin
P3502 19
Connector Pin
P3502 20
Connector Pin
P3502 22
GMA 35/35c Installation Manual
I/O
Out
I/O
In
I/O
In
Page 4-13