User Guide

ME910G1 HW Design Guide
1VV0301593 Rev.7 Page 54 of 98 2021-02-02
Note: In order to avoid a back powering it is recommended to prevent
any HIGH logic level signal from being applied to the digital pins of
the ME910G1 when the module is powered off or during an ON/OFF
transition. Refer to ME910G1 series AT command reference guide for
GPIO pins configuration.
Using a GPIO as OUTPUT
The GPIO pads, when used as outputs, can drive 1.8V CMOS digital devices or compatible
hardware. When set as outputs, the pads have a push-pull output and therefore the pull-
up resistor may be omitted.
Indication of network service availability
The STAT_LED pin status shows information on the network service availability and Call
status. The function is available as alternate function of GPIO_01 (to be enabled using
the AT#GPIO=1,0,2 command).
In the ME910G1 modules, the STAT_LED needs an external transistor to drive an external
LED and its voltage level is defined accordingly to the table below:
Device Status
Led Status
Device off
Permanently off
Not Registered
Permanently on
Registered in idle
Blinking 1sec on + 2 sec off
Registered in idle + power saving
It depends on the event that triggers the wakeup (In
sync with network paging)
Connecting
Blinking 1 sec on + 2 sec off
Table 24: LED and its status