Power Saving Mode; Minimum Functionality Mode - SimCom SIM5300E Hardware Design

Reset impulse
Note: It is recommended to cut off the VBAT power supply directly instead of using external reset pin
when SIM5300E cannot respond to the AT command "AT+CPOWD=1" and PWRKEY pin.
4.4

POWER SAVING MODE

The module has two kinds of sleep modes, which are selected by AT command: the Sleep Mode 1 is enabled
by hardware pin DTR and "AT+CSCLK=1", the Sleep Mode 2 is enabled by serial port and "AT+CSCLK=2"
regardless of DTR. In sleep mode, the current of module is very small. The AT command "AT+CFUN=<fun>"
can be used to set SIM5300E into minimum functionality. When SIM5300E is in sleep mode and minimum
functionality, the current of module is the lowest.

4.4.1 Minimum Functionality Mode

There are three functionality modes, which could be set by the AT command "AT+CFUN=<fun>". The
command provides the choice of the functionality levels <fun>=0, 1, 4.
0: minimum functionality.
1: full functionality (default).
4: flight mode (disable RF function).
Minimum functionality mode minimizes the current consumption to the lowest level. If SIM5300E is set to
minimum functionality mode by "AT+CFUN=0", the RF function and USIM card function will be disabled. In
this case, the serial port is still accessible, but all AT commands correlative with RF function and USIM card
function will not be accessible.
For detailed information about the AT Command "AT+CFUN=<fun>", please refer to document [1].
Table 8: The Current Consumption of Minimum Functionality Mode
SIM5300E_Hardware_Design_V1.02
NRESET
4.7K
100pF
47K
Figure 16: Reset reference design circuit
1.8V
200K
Reset logic
MODULE
22