Smart Machine Smart Decision
SIM5360_Hardware Design_V1.06
2016-11-17
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Before designing, please refer to Document [27] for more detail.
3.4.2
Power off Sequence
The following methods can be used to power off SIM5360. 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 SIM5360 by pulling the PWRKEY pin down
●
Method 2: Power off SIM5360 by AT command
User can power off the SIM5360 by pulling PWRKEY down for a specific time. The power off scenario is
illustrated in the following figure.
NETLIGHT/GPIO1
(Output)
V
IL
<0.3V
Toff
PWRKEY
( Input)
Tpd-
UART Port
Undefined
Active
USB Port
Undefined
Active
VDD_EXT
(Output )
Tpw-
Tuart
Tusb
V
IL
<0.3V
Ton
Trestart
Figure 16: Power off timing sequence
Table 10: Power off timing
Symbol
Parameter
Time value
Min.
Typ. Max. Unit
Toff
The time pulling PWRKEY down to power off
0.5
-
5
s
TpD-
The time to indicate disconnecting from the network
-
-
2
s
SIMCOM
CONFIDENTIAL
FILE
