Product Info

LTE Module Series
EC21 Hardware Design
EC21_Hardware_Design
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3.15. STATUS
The STATUS pin is an open drain output for indicating the module’s operation status. Customers can
connect it to a GPIO of DTE with a pull up resistor, or as the LED indication circuit shown below. When the
module is turned on normally, the STATUS will present the low state. Otherwise, the STATUS will present
high-impedance state.
Table 20: Pin Definition of STATUS
Pin Name
Pin No.
I/O
Description
Comment
STATUS
61
OD
Indicate the module’s operation status
An external pull-up resistor
is required.
If unused, keep it open.
The following figure shows different circuit designs of STATUS, and customers can choose either one
according to their application demands.
Figure 27: Reference Circuits of STATUS
3.16. Behaviors of RI
AT+QCFG="risignaltype","physical" command can be used to configure RI behavior.
No matter on which port URC is presented, URC will trigger the behavior of RI pin.