4 Circuit Design
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shows the reference circuit.
Figure 7. Button startup reference circuit
The following figure shows the startup timing sequence.
Figure 8. Startup timing sequence
Before pulling down the PWRKEY pin, make sure that the VBAT voltage is
stable. It is recommended to control the interval from power-up by VBAT to
PWRKEY pin pull-down no less than 30ms.
4.2.2
Auto power-on
To implement auto power-on, ground the PWRKEY pin. In this case, the module can be
powered off by disconnecting the power supply.
Содержание LC116-LA
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