Behaviors Of Ri - Quectel EG91 Series Hardware Design

Table 20: Characteristics of ADC Interface
Parameter
ADC0 Voltage Range
ADC Resolution
NOTES
1. It is prohibited to supply any voltage to ADC pins when VBAT is removed.
2. It is recommended to use resistor divider circuit for ADC application.
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 ofRI pin.
NOTE
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.
Table 21: Default Behaviors of RI
State
Idle
URC
EG91_Hardware_Design
Min. Typ.
0.3

3.17. Behaviors of RI

Response
RI keeps athigh level
RI outputs 120ms low pulse when a new URC returns
Max.
VBAT_BB
15
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LTE Module Series
EG91 Hardware Design
Unit
V
bits