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LTE Standard Module Series
EC21 Hardware Design
EC21_Hardware_Design 68 / 120
Figure 30: Reference Circuits of STATUS
The status pin cannot be used as indication of module shutdown status when VBAT power supply is
removed.
3.19. Behaviors of RI
AT+QCFG="risignaltype","physical" command can be used to configure RI behavior.
No matter on which port URC is presented, the URC will trigger the behaviors 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.
In addition, RI behavior can be configured flexibly. The default behaviors of the RI is shown as below.
Table 23: Behaviors of RI
State Response
Idle RI keeps at high level
URC RI outputs 120ms low pulse when a new URC returns
NOTE
NOTES