Product Info

LPWA Module Series
BC66-NA Hardware Design
BC66-NA_Hardware_Design 27 / 59
It is recommended use an open drain/collector driver to control the PWRKEY. A simple reference circuit is
illustrated in the following figure.
Figure 7: Turn on the Module Using Driving Circuit
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.
Figure 8: Turn on the Module Using Keystroke
The power up timing is illustrated in the following figure.
Figure 9: Power up Timing