Pin connector as seen from back of unit
This connector is available on Garmin GPS eTrex, eMap, Geko.
The 4-pin connector is the proprietary data and power interface found on the Garmin GPS eTrex, eMap, and Geko families of handheld receivers. It carries 3 V power supply, serial data in and out (RXD/TXD), and ground, and may be wired directly to a PC serial port. Only the four pins listed below are defined for this connector.
| Pin | Signal | Name | cable color |
|---|---|---|---|
| 1 | power supply | + 3V | red |
| 2 | data in | RXD | green |
| 3 | data out | TXD | white |
| 4 | ground | GND | black |
Notes
- May be connected directly to PC serial port.
References
- Garmin GPS to PC Wiring Instructions (P/N 190-00222-00) — Garmin Corporation; “units with 4 pin, rectangle plug”.