U)Sim Interfaces - Quectel EG91 Series Hardware Design

Figure 15: Reference Circuit of RESET_N by Using Button
The reset scenario is illustrated inthe following figure.
NOTES
1. Use RESET_N only when turning off the module by AT+QPOWDcommand and PWRKEY pin failed.
2. Ensure that there is no large capacitance on PWRKEY and RESET_N pins.
EG91provides two (U)SIMinterfaces, and only one (U)SIMcard can work at a time. The (U)SIM1 and
(U)SIM2cards can be switched by AT+QDSIM* command. For more details, please refer to document
[2].
The(U)SIM interfacescircuitrymeet ETSI and IMT-2000 requirements. Both 1.8V and 3.0V (U)SIMcards
are supported.
EG91_Hardware_Design
Figure 16: Reset Scenario

3.9. (U)SIM Interfaces

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LTE Module Series
EG91 Hardware Design