User's Manual

LTE Module Series
BG96-NA Hardware Design
BG96-NA_Hardware_Design Confidential / Released 28 / 64
3.6.3. Monitor the Power Supply
AT+CBC command can be used to monitor the VBAT_BB voltage value. For more details, please refer to
document [2].
3.7. Turn on and off Scenarios
3.7.1. Turn on 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/off the module
V
IH
max=2.1V
V
IH
min=1.3V
V
IL
max=0.5V
The output voltage is
0.8V because of the
diode drop in the
Qualcomm chipset.
When BG96-NA is in power down mode, it can be turned on to normal mode by driving the PWRKEY pin
to a low level for at least 100ms. It is recommended to use an open drain/collector driver to control the
PWRKEY. After STATUS pin outputting a high level, PWRKEY pin can be released. A simple reference
circuit is illustrated in the following figure.
Turn on pulse
PWRKEY
4.7K
47K
≥100ms
Figure 8: Turn on the Module Using Driving Circuit
The other way to control the PWRKEY is using a button directly. When pressing the key, electrostatic
strike may generate from finger. Therefore, a TVS component is indispensable to be placed nearby the
button for ESD protection. A reference circuit is shown in the following figure.