UMTS/HSPA Module Series
UG95 Hardware Design
UG95_Hardware_Design Confidential / Released 29 / 72
It is suggested that you should switch off power supply for module in abnormal state, and then switch on
power to restart module.
3.6.4. Monitor the Power Supply
The command
AT+CBC
can be used to monitor the VBAT_BB voltage value displayed in millivolt. For
more details, please refer to
document [1]
.
3.7. Turn on and off Scenarios
3.7.1. Turn on Module
Turn on the module using the PWRKEY. The following table shows the pin definition of PWRKEY.
Table 7: PWRKEY Pin Description
Pin Name
Pin No.
Description
DC Characteristics Comment
PWRKEY
15
Turn on the module
V
IH
max=2.1V
V
IH
min=1.3V
V
IL
max=0.5V
Pull-up to VRTC
internally
with 200kΩ
resistor.
When UG95 is in power down mode, it can be turned on to normal mode by driving the PWRKEY pin to a
low level at least 100ms. It is recommended to use an open drain/collector driver to control the PWRKEY.
The STATUS pin output a high level after UG95 is turned on. A simple reference circuit is illustrated in the
following figure.
Turn on pulse
PWRKEY
4.7K
47K
≥ 100ms
Figure 9: Turn on the Module Using Driving Circuit
NOTE
Quectel
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