Quectel BC66 - ADC Interface

NB-IoT Module Series
BC66 Hardware Design
BC66_Hardware_Design 24 / 59
PWRKEY cannot be pulled down all the time, otherwise the module will not be able to enter into Deep
Sleep.
3.7.2. Turn off
BC66 can be turned off though any of the following methods:
 Power off by AT+QPOWD=0.
 In emergent conditions, the module can be powered off through disconnecting VBAT power supply.
 The module will be powered off automatically when VBAT drops below 2.1V.
VBAT
VDD_EXT
RUNNING
OFF
Module
Status
AT+QPOWD=0
1.02s
Figure 9: Power down Timing (Power off by AT Command)
VBAT
VDD_EXT
RUNNING
OFF
Module
Status
≥5ms
Figure 10: Power down Timing (Power off by Disconnecting VBAT)
NOTE