W_Disable2 - Quectel RM520N-GL Hardware Design

4.4.2.

W_DISABLE2#*

The module provides a W_DISABLE2# pin to disable or enable the GNSS function. The W_DISABLE2#
pin is pulled up by default. Driving it LOW will disable the GNSS function. The combination of
W_DISABLE2# pin and AT commands can control the GNSS function.
Table 21: GNSS Function Status
W_DISABLE2# Level
High Level
High Level
Low Level
Low Level
A simple voltage level shifter based on diodes is used on W_DISABLE1# pin and W_DISABLE2# pin
which are pulled up to a 1.8 V voltage in the module, as shown in the following figure. So, the control
signals (GPIO) of the host device could be at 1.8 V or 3.3 V voltage level. W_DISABLE1# and
W_DISABLE2# are active LOW signals, and a reference circuit is shown as below.
Host
GPIO
GPIO
NOTE: The voltage level of VCC_IO_HOST could be 1.8 V or 3.3 V typically.
Figure 21: W_DISABLE1# and W_DISABLE2# Reference Circuit
RM520N-GL_Hardware_Design
AT Commands
AT+QGPS=1
AT+QGPSEND
AT+QGPS=1
AT+QGPSEND
VCC_IO_HOST
R3 R4
10k 10k
GNSS Function Status
Enabled
Disabled
Disabled
W_DISABLE2#
W_DISABLE1#
5G Module Series
Module
VDD 1.8V
R1 R2
100k 100k
26
BB
8
51 / 84