Product Info

LTE Standard Module Series
EC25 Mini PCIe Hardware Design
EC25_Mini_PCIe_Hardware_Design
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3.10.2. DTR Signal
The DTR signal is used for sleep mode control. It is pulled up by default. When module is in sleep mode,
driving it to low level can wake up the module. For more details about the preconditions for module to
enter sleep mode, please refer to Chapter 3.4.1.
3.10.3. W_DISABLE# Signal
EC25 Mini PCIe provides a W_DISABLE# signal to disable or enable the RF function (excluding GNSS).
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.
The RF function can also be enabled or disabled through AT commands AT+CFUN, and the details are
as follows.
Table 13: Airplane Mode Controlled by Hardware Method
Software method can be controlled by AT+CFUN, and the details are as follows.
Table 14: Airplane Mode Controlled by Software Method
3.10.4. PERST# Signal
The PERST# signal can be used to force a hardware reset on the card. The module can be reset by
driving the PERST# signal low for 150ms~460ms and then releasing it. The PERST# signal is sensitive to
interference. The traces should be as short as possible and be surrounded with ground. The reset
scenario is illustrated in the following figure.
W_DISABLE# RF Function Status Module Operation Mode
High level RF enabled Normal mode
Low level RF disabled Airplane mode
AT+CFUN=? RF Function Status Module Operation Mode
0 RF and (U)SIM disabled Minimum functionality mode
1 RF enabled Normal mode
4 RF disabled Airplane mode