Usb Application Without Usb Suspend Function; Airplane Mode - Quectel EC200T Series Hardware Design

3.5.1.4. USB Application without USB Suspend Function

If the host does not support USB Suspend function, please disconnect USB_VBUS with additional control
circuit to let the module enter into sleep mode.
 Execute AT+QSCLK=1 command to enable the sleep mode.
Ensure the MAIN_DTR is held at high level or keep it open.

 Disconnect USB_VBUS.
The following figure shows the connection between the module and the host.
Figure 5: Sleep Mode Application without Suspend Function
Switching on the power switch to supply power to USB_VBUS will wake up the module.
NOTE
Please pay attention to the level match shown in dotted line between the module and the host.

3.5.2. Airplane Mode

When the module enters airplane mode, the RF function will be disabled, and all AT commands related to
it will be inaccessible. This mode can be set via the following ways.
Hardware:
The W_DISABLE# pin is pulled up by default. Its control function for airplane mode is disabled by default,
and AT+QCFG="airplanecontrol",1 can be used to enable the function. Driving it to low level can make
the module enter airplane mode.
EC200T_Series_Hardware_Design
Module
Power
USB_VBUS
Switch
USB_DP
USB_DM
MAIN_RI
AP_READY
GND
LTE Standard Module Series
EC200T Series Hardware Design
Host
GPIO
VDD
USB_DP
USB_DM
EINT
GPIO
GND
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