Product Info

LTE Module Series
EC25 Mini PCIe Hardware Design
EC25_Mini_PCIe_Hardware_Design Confidential / Released 29 / 46
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 after executing AT+QCFG=“risignaltype”,“physical” command.
Figure 9: RI Behavior
3.8.2. DTR Signal
The DTR signal supports sleep control function. Driving it to low level will wake up the module.
3.8.3. W_DISABLE# Signal
EC25 Mini PCIe provides W_DISABLE# signal to disable wireless communications through hardware
operation. The following table shows the radio operational states of the module. Please refer to
document [2] for related AT commands.
Table 11: Radio Operational States
3.8.4. PERST# Signal
The PERST# signal can be used to force a hardware reset on the card. You can reset the module by
driving the PERST# to a low level voltage with the time frame of 150~460ms and then releasing it. The
reset scenario is illustrated in the following figure.
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