From 9826b90ef6f4b5d3dc6d678395e633f87f0de6a0 Mon Sep 17 00:00:00 2001 From: waltjohnson Date: Tue, 26 Mar 2024 18:10:25 -0600 Subject: [PATCH] Add comment about VCC_RF load switch and current limit resistor --- docs/user-manual/hardware/module_gpx1.md | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/docs/user-manual/hardware/module_gpx1.md b/docs/user-manual/hardware/module_gpx1.md index 35e7781..9a8d0e9 100644 --- a/docs/user-manual/hardware/module_gpx1.md +++ b/docs/user-manual/hardware/module_gpx1.md @@ -32,7 +32,7 @@ The GPX-1 module footprint and pinout similar that of the IMX-5 such that the co | 11,13,15,31 | GND | Power | Supply ground | | 12 | GNSS1_RF | I | GNSS1 antenna RF input. Use an active antenna or LNA with a gain of 15-25dB. Place the LNA as close to the antenna as possible. Filtered 3.3V from VCC is injected onto the pad to power active antennas (power injection can be disabled in software). Connect to ground with 5V-14V TVS diode for ESD and surge projection (e.g. Littlefuse PESD0402-140). | | 14 | GNSS2_RF | I | GNSS2 antenna RF input. Same requirements as GNSS1_RF | -| 16 | VCC_RF | O | Supply output for GNSS active antenna. Connect VCC_RF through 33-120nH inductor (e.g. Murata LQW15ANR12J00D, 110mA max) to GNSS1_RF and GNSS2_RF to inject DC supply for active antenna(s). VCC_RF is supplied from VAUX through an onboard load switch. | +| 16 | VCC_RF | O | Supply output for GNSS active antenna. Connect VCC_RF through 33-120nH inductor (e.g. Murata LQW15ANR12J00D, 110mA max) to GNSS1_RF and GNSS2_RF to inject DC supply for active antenna(s). VCC_RF is supplied from VAUX through an onboard 1A load switch and 10 ohm resistor. | | 20 | G20/LNA-EN | I/O | GPIO20 | | 21 | GNSS2_PPS | O | GNSS2 PPS time synchronization output pulse (1Hz, 10% duty cycle) | | 22 | nRESET | I | System reset on logic low. May be left unconnected if not used. |