Smart Machine Smart Decision
Table 6: Electronic characteristic of the RESET pin
Pin name
Symbol
Min
Typ
Max
Unit
V
IH
2.7
2.8
2.9
V
V
IL
-
-
0.6
V
RESET
Low power time
105
-
ms
The reset scenarios are illustrated in the following figures.
Figure 15: Reset timing sequence
4.3.
Power Saving Mode
SIM800H has two power saving modes: Minimum functionality mode and sleep mode. AT command
“AT+CSCLK=1”can be used to set SIM800H into sleep mode. AT command “AT+CFUN=<fun>“ can be used to
set SIM800H into minimum functionality. When SIM800H is in sleep mode and minimum functionality mode,
the current of module is lowest.
4.3.1.
Minimum Functionality Mode
There are three functionality modes, which could be set by AT command “AT+CFUN=<fun>“. The command
provides the choice of the functionality levels <fun>=0,1,4.
z
AT+CFUN=0
：
Minimum functionality.
z
AT+CFUN=1
：
Full functionality (default).
z
AT+CFUN=4
：
Flight mode (disable RF function).
Table 7: The current consumption of Minimum Functionality Mode (BS-PA-MFRMS=9)
<fun>
Current consumption(mA) (sleep mode)
0
0.796
1
1.02
4
0.892
SIM800H_Hardware_Design_V1.01
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2013-08-20
Содержание SIM800H
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