Quectel RM500Q-AE - Turn on and off Scenarios; Turn on the Module

5G Module Series
RM500Q-AE&RM502Q-AE Hardware Design
RM500Q-AE&RM502Q-AE_Hardware_Design 29 / 83
3.4.3.5. Turn on and off Scenarios
3.4.1.3.5.1. Turn on the Module
FULL_CARD_POWER_OFF# asynchronous signal is an Active Low input that is used to turn off the
entire module. When the input signal is asserted high ( ≥ 1.19 V), the module will be enabled. When the
input signal is driven low signal ( ≤ 0.2 V) or Tri-stated, it will force the module to shut down.
This input signal is 3.3 V tolerant and can be driven by either 1.8 V or 3.3 V GPIO. Also, it has internally
pulled down with a 100 kΩ resistor.
The following table shows the definition of FULL_CARD_POWER_OFF#.
Table 776: Definition of FULL_CARD_POWER_OFF# Pin
The timing of turn-on scenario is illustrated in the following figure.
VCC
RESET_N
Module power-on or insertion detection
USIM1_VDD / USIM2_VDD
Module Status
FULL_CARD_POWER_OFF#
RFFE_VIO_1V8
System turn-on and booting
V
IH
≥ 1.19 V
1.8 V or 3.0 V
System booting
Inactive
Active
t
power-on
t
turn-on
t
booting
68 ms
19.7 s
t
USIM
t
0
Figure 6: Turn-on Timing of the Module
Pin No.
Pin Name
Description
DC Characteristics
Comment
6
FULL_CARD_
POWER_
OFF#
Turn on/off of the
module.
V
IH(max)
= 4.4 V
V
IH(min)
= 1.19 V
V
IL(max)
= 0.2 V
Internally pulled down with a
100 kΩ resistor
When it is at low level, the
module is powered off.
When it is at high level, the
module is powered on.