Status; Adc Interface - Quectel EG91 Series Hardware Design

3.15. STATUS

The STATUS pin is set as the module's operation status indicator. It will output high level when the
module is powered on. The following table describes the pin definition of STATUS.
Table 17: Pin Definition of STATUS
Pin Name Pin No.
STATUS 20
The following figure shows the reference circuit of STATUS.

3.16. ADC Interface

The module provides one analog-to-digital converter (ADC) interface. AT+QADC=0 can be used to read
the voltage value on ADC0 pin. For more details about the command, see document [3].
To improve the accuracy of ADC voltage values, the traces of ADC should be surrounded by ground.
Table 18: Pin Definition of ADC Interface
Pin Name Pin No.
ADC0 24
EG91_Series_Hardware_Design
I/O Description
DO Indicate the module's operation status
Figure 27: Reference Circuit of STATUS
I/O Description
AI General-purpose ADC interface
LTE Standard Module Series
Comment
1.8 V power domain.
If unused, keep it open.
Comment
If unused, keep this pin
open.
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