Product Info

LTE Standard Module Series
EC21_Series_Mini_PCIe_Hardware_Design
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3.10.1. RI
The RI signal can be used to wake up the host. When a URC returns, there will be the following
behaviors on the RI pin after executing AT+QCFG="risignaltype","physical". See document
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Figure 11: RI Behaviors
3.10.2. DTR
The DTR signal is used for sleep mode control. It is pulled up by default. When the module is in sleep
mode, driving DTR low can wake up the module. For more details about the preconditions for the module
to enter sleep mode, refer to Chapter 3.4.1.
3.10.3. W_DISABLE#
EC21 series 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. The W_DISABLE# control function for airplane
mode is disabled in firmware by default, it can be enabled by AT+QCFG=“airplanecontrol”,1. Driving it
low can make the module enter airplane mode. See document
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Table 13: Airplane Mode Controlled by Hardware Method
The RF function can also be enabled or disabled through AT+CFUN, and the details are as follows.
W_DISABLE# RF Function Status Module Operation Mode
High level RF enabled Normal mode
Low level RF disabled Airplane mode