Specifications

SIM7912&SIM7906 Hardware Design V1.02
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Table 44: 1.8V digital I/O characteristics
Parameter
Description
Min.
Typ.
Max.
Unit
V
IH
High-level input voltage
1.17
-
2.1
V
V
IL
Low-level input voltage
0
-
0.63
V
V
OH
High-level output voltage
1.35
-
1.8
V
V
OL
Low-level output voltage
0
-
0.45
V
These parameters are for digital interface pins, such as UART, I2C, I2S, SPI, and GPIOs (SIM_DET,
SD_DET).
Table 45: Operating temperature
Parameter
Min.
Typ.
Max.
Unit
Normal operation temperature (3GPP compliant)
-30
+25
+75
℃
Extended operation temperature
-40
-
+85
℃
Storage temperature
-40
-
+90
℃
5.3 Operating Mode
5.3.1 Operating Mode Definition
The table below summarizes the various operating modes of module.
Table 46: Operating mode definition
Mode
Function
Normal
operation
Sleep
AT command “AT+CSCLK=1” can be used to set the module to a sleep
mode. In this case, the current consumption of module will be reduced
to a very low level and the module can still receive paging message
and SMS.
Idle
Software is active. Module is registered to the network and ready to
NOTE