Use Instructions

L710HG Hardware Design
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power on.
2. The STATUS pin can be used to identify whether has been power on, when the module has
access to electricity and initialization is completed, the STATUS output high level, or has
maintained low level.
3.9.3 Power off sequence
The following methods can be used to power down. 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 L710HG using the PWRKEY pin
● Method 2: Power off L710HG by AT command “AT+CPOF”
Note: 1. About the AT command “AT+CPOF” detail please refer document [1].
2. Over-voltage or under-voltage may cause automatic power down.
3. Over-temperature or under-temperature may cause automatic power down.
Table 3-15 Power off timing chart.
SYMBOL
SIGNAL
MIN.
TYP. MAX. UNIT
Toff
Low level pulse width when power
off
1.5 -- -- s
Toff(status) Power off time (According to the
STATUS pin judgment)
2 -- -- s
Toff(uart) Power off time (according th
e
UART pin judgement)
2 -- -- s
Toff-on Power on—power off buffer time 2 -- -- s
Figures 3-16 Power off Timing sequence
Note: the STATUS pin can be used to identify whether has been power on, when the module has
access to electricity and initialization is completed, the STATUS output high level, or has
maintained low level.