Product Info

LTE Standard Module Series
EC21 Hardware Design
EC21_Hardware_Design 67 / 120
Figure 29: Reference Circuit of the Network Indicator
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. 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 customers’ application demands.