Service Guide

LTE Standard Module Series
EG91_Series_Hardware_Design
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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
The following figure shows the reference circuit of STATUS.
Figure 27: 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. I/O Description Comment
STATUS 20 DO Indicate the module’s operation status
1.8 V power domain.
If unused, keep it open.
Pin Name Pin No. I/O Description Comment
ADC0 24 AI General-purpose ADC interface
If unused, keep this pin
open.