LTE Module Series
EC20 Mini PCIe Hardware Design
EC20_Mini_PCIe_Hardware_Design Confidential / Released 25 / 36
3.8.1. RI Signal
The RI signal can be used to wake up the host. When URC returns, there will be the following behavior on
the RI pin.
URC return
120 ms
High
Low
Figure 11: RI Behavior
3.8.2. DTR Signal
The DTR signal supports sleep control function, drive it to low level will wake up the module. AT command
AT+QCFG="pwrsavedtr"
is used to disable the sleep control function.
3.8.3. W_DISABLE# Signal
EC20 Mini PCIe provides W_DISABLE# signal to disable wireless communications through hardware
operation. The following table shows the radio operational states of module. Please refer to
document [2]
for related AT commands.
Table 11: Radio Operational States
W_DISABLE#
AT Commands
Radio Operation
High Level
AT+CFUN=1
Enabled
High Level
AT+CFUN=0
AT+CFUN=4
Disabled
Low Level
AT+CFUN=0
AT+CFUN=1
AT+CFUN=4
Disabled
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