5G Module Series
RM520N-GL_Hardware_Design 27 / 84
3 Operating Characteristics
3.1. Operating Modes
The table below briefly summarizes the various operating modes of RM520N-GL.
Table 6: Overview of Operating Modes
3.1.1. Sleep Mode
DRX of the module is able to reduce the current consumption to a minimum value during the sleep mode,
and DRX cycle index values are broadcasted by the wireless network. The figure below shows the
relationship between the DRX run time and the current consumption in sleep mode. The longer the DRX
cycle is, the lower the current consumption will be.
Software is active. The module has registered on the network, and it
is ready to send and receive data.
Network connected. In this mode, the power consumption is decided
by network setting and data transfer rate.
Minimum Functionality
Mode
AT+CFUN=0 command sets the module to a minimum functionality mode
without removing the power supply. In this mode, both RF function and (U)SIM
card are invalid.
AT+CFUN=4 command or driving W_DISABLE1# pin LOW will set the module
to airplane mode. In this mode, the RF function is invalid.
When AT+QSCLK=1 command is executed and the host’s USB bus enters
suspend mode, the module will enter sleep mode. The module keeps receiving
paging messages, SMS, voice calls* and TCP/UDP data from the network with
its current consumption reducing to the minimal level.
In this mode, the power management unit shuts down the power supply.
Software is inactive, all application interfaces are inaccessible, and the
operating voltage (connected to VCC) remains applied.
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