Airplane Mode - Quectel UC20 Hardware Design

The following figure shows the connection between the module and application processor.
Supply power to USB_VBUS will wake up the module.
In sleep mode, module can still receive paging, SMS, voice call and TCP/UDP data from network, but the
UART port is not accessible. When the module enters into the sleep mode, the SLEEP_IND will output a
high logic level.
For more details about power saving mode, please refer to document [8].

3.5.2. Airplane Mode

When module enters into the airplane mode, the RF function does not work, and all AT commands
correlative with RF function will be not accessible. This mode can be set with the following way.
Hardware:
The W_DISABLE# pin is pulled up by default, drive it to low level will let the module enter into airplane
mode.
Software:
Command AT+CFUN provides the choice of the functionality level <fun>=0, 1, 4.
AT+CFUN=0: Minimum functionality mode, both USIM and RF function are disabled.
AT+CFUN=1: Full functionality mode (by default).
AT+CFUN=4: Airplane mode. RF function is disabled.
UC20_Hardware_Design
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Module
USB_VBUS
USB_DP
USB_DM
RI
AP_READY
GND
Figure 5: USB Sleep Application without Suspend Function
GPIO
Power
VDD
Switch
USB_DP
USB_DM
EINT
GPIO
GND
Confidential / Released
UMTS/HSPA Module Series
UC20 Hardware Design
Processor
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