From e889d685b4d8b94c2534f258a04b9725dc776695 Mon Sep 17 00:00:00 2001 From: Marcus Müller Date: Tue, 21 Jul 2015 20:06:43 +0200 Subject: docs: Added paragraph on GPIO maximum current, +3.3V supply --- host/docs/gpio_api.dox | 4 ++++ host/docs/usrp_x3x0.dox | 4 ++++ 2 files changed, 8 insertions(+) (limited to 'host/docs') diff --git a/host/docs/gpio_api.dox b/host/docs/gpio_api.dox index d3bb4f0a9..98515d07b 100644 --- a/host/docs/gpio_api.dox +++ b/host/docs/gpio_api.dox @@ -13,6 +13,10 @@ disabling a TX or RX mixer). \subsection xgpio_fpanel_gpio X3x0 Front Panel GPIO +The GPIO port is not meant to drive big loads. You should not try to source more than 5mA per pin. + +The +3.3V is for ESD clamping purposes only and not designed to deliver high currents. + \subsubsection xgpio_fpanel_conn Connector \image html x3x0_gpio_conn.png "X3x0 GPIO Connectors" diff --git a/host/docs/usrp_x3x0.dox b/host/docs/usrp_x3x0.dox index f3e916ac1..9af68546f 100644 --- a/host/docs/usrp_x3x0.dox +++ b/host/docs/usrp_x3x0.dox @@ -584,6 +584,10 @@ Please see \ref page_gpsdo_x3x0 for information on configuring and using the int \image html x3x0_gpio_conn.png "X3x0 GPIO Connector" +The GPIO port is not meant to drive big loads. You should not try to source more than 5mA per pin. + +The +3.3V is for ESD clamping purposes only and not designed to deliver high currents. + ### Pin Mapping - Pin 1: +3.3V -- cgit v1.2.3