Status - Quectel EC21 Series Hardware Design

3.18. STATUS

The STATUS pin is an open drain output for indicating the module's operation status. It can be
connected to a GPIO of DTE with a pull-up resistor, or as LED indication circuit as below. When the
module is turned on normally, the STATUS will present the low state. Otherwise, the STATUS will present
high-impedance state.
Table 22: Pin Definition of STATUS
Pin Name Pin No.
STATUS 61
The following figure shows different circuit designs of STATUS, and customers can choose either one
according to customers' application demands.
NOTE
The status pin cannot be used as indication of module shutdown status when VBAT power supply is
removed.
EC21_Series_Hardware_Design
I/O Description
Indicate the module's
OD
operation status
Figure 30: Reference Design of STATUS
LTE Standard Module Series
Comment
The driving current should be less than
0.9 mA.
An external pull-up resistor is required.
If unused, keep it open.
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