N58 Hardware User Guide
Chapter 5 Application Interfaces
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Figure 5-9 Startup process
5s
VBAT
PWRKEY_N
UART
1.8s<T<3s
Active
Inactive
Shutdown Process
Two methods are available to shut down the module: hard shutdown and soft shutdown.
Hard shutdown is implemented by using the PWRKEY_N pin. When the module is working properly,
inputting a low-level pulse for more than 2s at the PWRKEY_N pin can trigger power-off of the module.
The following figure shows the hard shutdown process.
Figure 5-10 Hard shutdown process
VBAT
PWRKEY_N
UART
T>2s
Inactive
Active