
LTE Module Series
EG95 Hardware Design
EG95_Hardware_Design 36 / 81
EG95 supports (U)SIM card hot-plug via the USIM1_PRESENCE and USIM2_PRESENCE pins. The
function supports low level and high level detections, 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)SIM1 interface with an 8-pin (U)SIM card connector.
Module
USIM1_VDD
USIM_GND
USIM1_RST
USIM1_CLK
USIM1_DATA
USIM1_PRESENCE
0R
0R
0R
VDD_EXT
51K
100nF
(U)SIM Card Connector
GND
GND
33pF 33pF 33pF
VCC
RST
CLK
IO
VPP
GND
GND
USIM1_VDD
15K
Figure 17: Reference Circuit of (U)SIM1 Interface with an 8-Pin (U)SIM Card Connector
If (U)SIM1 card detection function is not needed, please keep USIM1_PRESENCE unconnected. A
reference circuit of (U)SIM1 interface with a 6-pin (U)SIM card connector is illustrated in the following
figure.
Module
USIM1_VDD
USIM_GND
USIM1_RST
USIM1_CLK
USIM1_DATA
0R
0R
0R
100nF
(U)SIM Card Connector
GND
33pF 33pF 33pF
VCC
RST
CLK
IO
VPP
GND
GND
15K
USIM1_VDD
Figure 18: Reference Circuit of (U)SIM1 Interface with a 6-Pin (U)SIM Card Connector