Quectel RM520N-GL - W_Disable2

5G Module Series
RM520N-GL_Hardware_Design 51 / 84
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
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 Module
W_DISABLE2#
W_DISABLE1#
BB
GPIO
GPIO
26
8
VDD 1.8V
R3
10k
R4
10k
NOTE: The voltage level of VCC_IO_HOST could be 1.8 V or 3.3 V typically.
VCC_IO_HOST
R1
100k
R2
100k
Figure 21: W_DISABLE1# and W_DISABLE2# Reference Circuit
W_DISABLE2# Level
AT Commands
GNSS Function Status
High Level
AT+QGPS=1
Enabled
High Level
AT+QGPSEND
Disabled
Low Level
AT+QGPS=1
Disabled
Low Level
AT+QGPSEND