LTE-A Module Series
EM120R-GL&EM160R-GL Hardware Design
EM120R-GL&EM160R-GL_Hardware_Design 29 / 79
VCC
FULL_CARD_POWER_OFF#
Running
OFF
Module Status
Power-off procedure
RESET#(H)
USB/PCIe
AT+QPOWD
USB/PCIe
remove
Figure 11: Timing of Turning off the Module through AT Command and
FULL_CARD_POWER_OFF#
For the circuit design of
Figure 7,
cut off power supply of VCC after the module
’s USB/PCIe is removed,
as illustrated in
Figure 11
. Otherwise, the module will be powered on again.
VCC
FULL_CARD_POWER_OFF#(H)
Running
OFF
Module Status
Power-off procedure
RESET#(H)
USB/PCIe
AT+QPOWD
USB/PCIe
remove
Figure 12: Timing of Turning off the Module through AT Command and Power Supply
Please pull down FULL_CARD_POWER_OFF# pin immediately or cut off the power supply of VCC when
the host detects that the module is removed.
NOTE