User's Manual

Smart Machine Smart Decision
SIM5320AL_User Manual_V1.01 2014-08-20
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Tusb The time to enable USB - - 9 s
Note: Module could be automatically power on by connecting Power ON pin to Low level directly.
Before designing, please refer to Document [25] for more detail.
3.2.2 Power off Sequence
The following methods can be used to power down SIM5320AL. These procedures will make module
disconnect from the network and allow the software to enter a safe state, and then save data before
completely powering the module off.
● Method 1: Power off SIM5320AL by pulling the POWER_ON pin down
● Method 2: Power off SIM5320AL by AT command
User can power off the SIM5320AL by pulling POWER_ON down for a specific time. The power off
scenario is illustrated in the following figure.
Figure 16: Power off timing sequence
Table 6: Power off timing
Parameter Description
Time value
Min. Typ. Max. Unit
Toff The time pulling POWER_ON down to power off 0.5 - 5 s