USGlobalsat ET-312 - Manual (Page 5)

ET-312
The Specifications are subject to be changed without notice. Copyright © 2007, GlobalSat Technology.
Page 5 of 21
Version 1.4
5.0v.
9. GPIO1 User can use this I/O pin for special function.For example, on/off LED
10. TX This is the main transmits channel for outputting navigation and
measurement data to user’s navigation software or user written
software.Output TTL level, 0V ~ 2.85V
11. RX This is the main receive channel for receiving software commands to the
engine board from SiRFdemo software or from user written software.
12. GND Ground.
13. GND Ground.