5G Module Series
RM505Q-AE Hardware Design
RM505Q-AE_Hardware_Design 26 / 79
It is recommended to use a host GPIO to control FULL_CARD_POWER_OFF# to turn on the module. A
simple reference circuit is illustrated as the following figure.
Host
Module
FULL_CARD_POWER_OFF#
PMU
GPIO
6
1.8 V or 3.3 V
Note:
The voltage of pin 6 should be no less than 1.19 V when it is at HIGH level.
R4
100k
Figure 7: Turn on the Module with a Host GPIO
1. t
power-on
is the interval between VCC and RESET_N high voltage level. It is measured when
RESET_N is not pulled down by the host device.
2. t
turn-on
is the interval between FULL_CARD_POWER_OFF# high voltage level and RFFE_VIO_1V8
(an internal LDO output) high voltage level, which is typically 68 ms.
3. t
0
is the interval between VCC and FULL_CARD_POWER_OFF# high voltage level.
FULL_CARD_POWER_OFF# could be pulled up at any time decided by the host, as shown in figure
above.
4. t
booting
is the interval between RFFE_VIO_1V8 high voltage level and the USIM_VDD power-on.
3.5.2. Turn off the Module
3.5.2.1. Turn off the Module through FULL_CARD_POWER_OFF#
For the design that turns on the module with a host GPIO, when the power is supplied to VCC, pulling
down the FULL_CARD_POWER_OFF# pin will turn off the module.
The timing of turning-off scenario is illustrated in the following figure.
NOTES
