Turn Off; Turn Off The Module Through Fcpo - Quectel RM502Q-GL Hardware Design

Table 9: Turn-on Timing of the Module
Symbol Min.
T 0 ms
power-on
T -
VCC-RST#
T 68 ms
turn-on
T 20 s
booting
T -
registering

3.5. Turn off

3.5.1. Turn off the Module Through FCPO#

For the design that turns on the module with a host GPIO, when the power is supplied to VCC, driving
FULL_CARD_POWER_OFF# pin LOW (≤ 0.2 V) or tri-stating the pin will turn off the module.
The timing of turning-off scenario is illustrated by the following figure.
3.7 V
VCC(H)
1.8 V
RESET#(H)
V
FCPO#
1.8 V
RFFE_VIO_1V8
1.8 V or 3.0 V
USIM_VDD
Module Status
NOTES:
1. The host GPIO pulls down FCPO# to control the module to shut down;
2. As shown by the dotted line, it is recommended to disconnect VCC and pull RESET# low after the module shuts down.
RM502Q-GL_Hardware_Design
Typ. Max.
20 ms -
33 ms -
- -
22 s -
- -
≥ 1.19 V
IH
Running
Figure 10: Turn-off Timing Through FCPO#
RM502Q-GL Hardware Design
Comment
Module power-on time depending on the host.
Time period between module power-on and
RESET# being driven HIGH.
Module system turn-on time.
Module system booting time.
Network registering time related to network CSQ.
Turn-off procedure
T
turn-off
5G Module Series
≤ 0.5 V
V
IL
OFF
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