Hardware

Antenna Ports
A DIVISION OF TRIMBLE
Functionality of the Micro 57
GPIO 1 & 2 Used for Antenna Switching
If only one GPIO Output line is used for antenna control, the combinations of the available
output control line states (the GPIO line in use and the module port) result in a subset of
logical antenna settings which can be used.
ONLY GPIO 1 Used for Antenna Switching
Note
The “missing” logical antenna settings are still usable when only one GPIO
line is used for antenna control and simply results in redundant logical
antenna settings. For example, using only GPIO 1, logical setting 1 and 3
both result in GPIO1=Low and Micro port A1 active.
Logical Antenna
Setting
GPIO
Output 1
State
GPIO
Output 2
State
Active Micro
Physical Port
1 Low Low A1
2 Low Low A2
3 Low High A1
4 Low High A2
5 High Low A1
6 High Low A2
7 High High A1
8 High High A2
Logical Antenna
Setting
GPIO
Output 1
State
Active Micro
Physical Port
1 Low A1
2 Low A2
5 High A1
6 High A2