User's Guide

Review Copy 11-6-10
ThingMagic Micro Family User Guide
27
www.JADAKtech.com
GPIO 1 & 2 Used for Antenna Switching (Continued)
4
Low
High
A2
5
High
Low
A1
6
High
Low
A2
7
High
High
A1
8
High
High
A2
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
Logical Antenna
Setting
GPIO
Output 1
State
Active Micro
Physical Port
1
Low
A1
2
Low
A2
5
High
A1
6
High
A2
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.
Only GPIO 2 Used for Antenna Switching
Logical Antenna
Setting
GPIO
Output 2
State
Active Micro
Physical Port
1
Low
A1
2
Low
A2
3
High
A1
4
High
A2