External Configuration Module Pin Assignments, J3472 - Garmin GMA 347 Installation Manual

4.3.6 External Configuration Module
The configuration module contains an I2C temp sensor and EEPROM. The configuration module is
located in the connector backshell. The configuration module stores a backup of the unit configuration.
Table 4-8. External Configuration Module Pin Assignments, J3472
Pin Pin Name
1 Configuration Module Ground
21 Configuration Module Power
40 Configuration Module Data
60 Configuration Module Clock
4.3.7 Speaker
The speaker output is capable of driving up to 10 Watts into a 4
Pin Pin Name
41 SPEAKER AUDIO OUT LO
42 SPEAKER AUDIO OUT HI
4.3.8 PA MUTE
PA MUTE is an output that when pulled low is active. It is used to trigger the mute function on
an external PA system.
Pin Pin Name
64 PA MUTE* OUT
* Denotes Active Low (Ground to activate).
GMA 347 Installation Manual
190-00325-01
Ground
+3.3 VDC
Bi-directional data line
Signal used to clock data input\output
Table 4-9. Speaker Pin Assignments, J3472
Ground reference for speaker audio
Speaker audio output
Table 4-10. PA MUTE Pin Assignments, J3472
Output capable of sinking 500 mA
Description
or 8 speaker.
Description
Description
I/O
--
In
In/Out
Out
I/O
--
Out
I/O
Out
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