Quectel RG520N-AT - Sleep Mode; UART Application Scenario

5G Module Series
RG520N-AT_Hardware_Design 32 / 109
3.2. Sleep Mode
DRX of the module is able to reduce the current consumption to a minimum value during sleep mode. The
diagram below illustrates the relationship between the DRX run time and the current consumption of the
module in this mode.
Current
Run Time
DRX OFF ON OFF
ON ON OFF OFF
ON
OFF
Figure 3: DRX Run Time and Current Consumption in Sleep Mode
3.2.1. UART Application Scenario
If MCU communicates with the module via UART, the following two preconditions should be met to set the
module to sleep mode:
⚫ Execute AT+QSCLK=1 to enable sleep mode.
⚫ Drive MAIN_DTR high.
The figure illustrates the connection between the module and MCU.
MAIN_RXD
MAIN_TXD
MAIN_RI
Module
MCU
MAIN_DTR
TXD
RXD
EINT
GPIO
GNDGND
Figure 4: Sleep Mode Application via UART
⚫ Driving MAIN_DTR low with the host will wake up the module.