Quectel LTE-A Module Series - Page 30

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