Quectel EM05-G - WDISABLE2#*

LTE Standard Module Series
EM05-G Hardware Design
EM05-G_Hardware_Design 44 / 69
4.4.2. W_DISABLE2#*
EM05-G 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 controls the GNSS function.
Table 15: GNSS Function Status
A simple voltage-level translator 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 1.8 V or 3.3 V voltage level. W_DISABLE1# and
W_DISABLE2# are active LOW, and a reference circuit is presented below.
Host Module
W_DISABLE2#
W_DISABLE1#
BB
GPIO
GPIO
26
8
VDD 1.8 V
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
10k
R2
10k
Figure 21: W_DISABLE1# and W_DISABLE2# Reference Circuit
W_DISABLE2# Logic Level
AT Commands
GNSS Function Status
High Level
AT+QGPS=1
Enabled
High Level
AT+QGPSEND
Disabled
Low Level
AT+QGPS=1
Low Level
AT+QGPSEND