Quectel EG91 Series Hardware Design page 45
Lte standard module
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Also See for EG91 Series:
- Hardware design (98 pages) ,
- Hardware design (94 pages) ,
- Hardware design (109 pages)
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USIM1_RST
USIM1_
PRESENCE
USIM2_VDD
USIM2_DATA
USIM2_CLK
USIM2_RST
USIM2_
PRESENCE
EG91 series module supports (U)SIM card hot-plug via USIM_PRESENCE (USIM1_PRESENCE/USIM2
_PRESENCE) pin, and both high and low level detection are supported. The function is disabled by
default, and see AT+QSIMDET in document [3] for more details.
The following figure shows a reference design for (U)SIM interface with an 8-pin (U)SIM card connector.
USIM_GND
USIM_VDD
USIM_RST
Module
USIM_CLK
USIM_PRESENCE
USIM_DATA
Figure 17: Reference Circuit of (U)SIM Interface with an 8-pin (U)SIM Card Connector
EG91_Series_Hardware_Design
44
DO
(U)SIM1 card reset
42
DI
(U)SIM1 card insertion detection
87
PO
(U)SIM2 card power supply
86
DIO
(U)SIM2 card data
84
DO
(U)SIM2 card clock
85
DO
(U)SIM2 card reset
83
DI
(U)SIM2 card insertion detection
VDD_EXT
USIM_VDD
51K
0R
0R
0R
33 pF 33 pF 33 pF
15K
100 nF
GND
GND
LTE Standard Module Series
1.8 V power domain.
If unused, keep it open.
Either 1.8 V or 3.0 V is
supported by the module
automatically.
If unused, keep it open.
1.8 V power domain.
If unused, keep it open.
(U)SIM Card Connector
VCC
GND
RST
VPP
IO
CLK
GND
44 / 105
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