Turn Off The Module; Turn Off The Module Through Full_Card_Power_Off; Turn Off The Module Through At Command - Quectel RM502Q-GL Hardware Design

internal LDO output) HIGH level, which is typically 68 ms.
3. t is the time interval between VCC and FULL_CARD_POWER_OFF# HIGH level. It could be 0 by
0
turning on the module automatically as shown in Figure 7, or any other time decided by the host as
shown in Figure 6.
t is the time interval between RFFE_VIO_1V8 HIGH level and the USIM_VDD power-on.
booting

3.4.2. Turn off the Module

3.4.2.1. Turn off the Module through FULL_CARD_POWER_OFF#

In Figure 6, pulling down the FULL_CARD_POWER_OFF# pin will turn off the module. The turn off
scenario is illustrated in the following figure.
RESET_N(H)
FULL_CARD_POWER_OFF#
Module Status
Figure 10: Turn-off Timing through FULL_CARD_POWER_OFF#

3.4.2.2. Turn off the Module through AT Command

It is a safe way to use AT+QPOWD command to turn off the module. For more details about the
command, please refer to document [2].
For the circuit design of Figure 6, please pull down FULL_CARD_POWER_OFF# pin, or cut off power
supply of VCC after the module USB/PCIe is removed. Otherwise, the module will be powered on again.
RM502Q-GL_Hardware_Design
VCC
RUNNING
RM502Q-GL Hardware Design
≥10 s
Power-off procedure
5G Module Series
OFF
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