Product Info

LTE Standard Module Series
EG91 Hardware Design
EG91_Hardware_Design 38 / 93
Table 9: Pin Definition of (U)SIM Interfaces
Pin Name Pin No. I/O Description Comment
USIM1_VDD 43 PO Power supply for (U)SIM1 card
Either 1.8V or 3.0V is
supported by the module
automatically.
USIM1_DATA 45 IO Data signal of (U)SIM1 card
USIM1_CLK 46 DO Clock signal of (U)SIM1 card
USIM1_RST 44 DO Reset signal of (U)SIM1 card
USIM1_
PRESENCE
42 DI (U)SIM1 card insertion detection
USIM_GND 47 Specified ground for (U)SIM card
USIM2_VDD 87 PO Power supply for (U)SIM2 card
Either 1.8V or 3.0V is
supported by the module
automatically.
USIM2_DATA 86 IO Data signal of (U)SIM2 card
USIM2_CLK 84 DO Clock signal of (U)SIM2 card
USIM2_RST 85 DO Reset signal of (U)SIM2 card
USIM2_
PRESENCE
83 DI (U)SIM2 card insertion detection
EG91 supports (U)SIM card hot-plug via USIM_PRESENCE (USIM1_PRESENCE/USIM2_PRESENCE)
pin. The function supports low level and high level detection, and is disabled by default. Please refer to
document [2] about AT+QSIMDET command for details.
The following figure shows a reference design for (U)SIM interface with an 8-pin (U)SIM card connector.