LTE Standard Module Series
EG91 Series Hardware Design
EG91_Series_Hardware_Design 54 / 106
Table 19: Pin Definition of ADC Interface
Pin Name Pin No. I/O Description Comment
ADC0 24 AI
General-purpose analog to digital
converter
If unused, keep this pin
open.
The following table describes the characteristics of ADC interface.
Table 20: Characteristics of ADC Interface
Parameter Min. Typ. Max. Unit
ADC0 Voltage Range 0.3 VBAT_BB V
ADC Resolution 15 bits
1. It is prohibited to supply any voltage to ADC pins when ADC pins are not powered by VBAT.
2. It is recommended to use resistor divider circuit for ADC application.
3.17. Behaviors of RI
AT+QCFG="risignaltype","physical" command can be used to configure RI behavior. The default RI
behaviors can be changed by AT+QCFG="urc/ri/ring" command. Please refer to document [2] for
details.
No matter on which port URC is presented, URC will trigger the behavior of RI pin.
URC can be outputted from UART port, USB AT port and USB modem port through configuration via
AT+QURCCFG command. The default port is USB AT port.
The default behaviors of the RI are shown as below.
NOTE
NOTES
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