User's Manual

LTE

Module BEC CBRS-12 User Manual

Figure 16: Timing of Resetting the Module

1. RESET_N can only be used when turning off the module failed either by AT+QPOWD command or

PWRKEY.

2. Please ensure that there is no large capacitance on PWRKEY and RESET_N.

3.9. (U)SIM Interfaces

BEC CBRS-12 provides two (U)SIM interfaces. The circuitry of (U)SIM interfaces meets ETSI and

IMT-2000 requirements. Either 1.8V or 3.0V (U)SIM cards are supported. Dual SIM Single Standby

function is supported and (U)SIM card switching is enabled by AT+QUIMSLOT command. For more

details, please refer to document [2].

Table 10: Pin Definition of the (U)SIM Interfaces

Pin Name Pin No.

I/O Description Comment

USIM1_DET 25 DI (U)SIM1 card insertion detection

USIM1_VDD 26 PO Power supply for (U)SIM1 card

Either 1.8V or 3.0V is supported

by the module automatically.

USIM1_CLK 27 DO Clock signal of (U)SIM1 card

USIM1_RST 28 DO Reset signal of (U)SIM1 card

USIM1_DATA 29 IO Data signal of (U)SIM1 card

USIM2_VDD 74 PO Power supply for (U)SIM2 card

Either 1.8V or 3.0V is supported

by the module automatically.