Power Up/Power Down Scenarios; Power Up - Quectel BC950N-N1 Hardware Design

3.6. Power up/Power Down Scenarios

3.6.1. Power up

BC950N-N1 will be powered up after driving the PWRKEY pin to a low level voltage for at least 500ms.
Table 9: PWRKEY Pin
Pin Name Pin No.
PWRKEY 14
It is recommended use an open drain/collector driver to control the PWRKEY. A simple reference circuit is
illustrated in the following figure.
Another way to control the PWRKEY is using a button directly. When pressing the key, electrostatic strike
may generate from the 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.
The power up timing is illustrated in the following figure.
BC950N-N1_Hardware_Design
Description
Pull down PWRKEY to power
up the module.
4.7K
Turn on pulse
Figure 6: Turn on the Module Using Driving Circuit
S1
Figure 7: Turn on the Module Using Keystroke
PWRKEY Pull-down Time
≥500ms
PWRKEY
47K
PWRKEY
TVS
Close to S1
LPWA Module Series
BC950N-N1 Hardware Design
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