UMTS/HSPA Module Series
UG95 Hardware Design
UG95_Hardware_Design Confidential / Released 40 / 72
Table 12: Pin Definition of the USIM Interface
Pin Name
Pin No. I/O
Description
Comment
USIM_PRESENCE
42
DI
USIM card detection input.
1.8V power domain.
USIM_VDD
43
PO
Power supply for USIM card.
Either 1.8V or 3.0V is
supported by the module
automatically.
USIM_RST
44
DO
Reset signal of USIM card.
USIM_DATA
45
IO
Data signal of USIM card.
Pull-up to USIM_VDD with
4.7k resistor internally.
USIM_CLK
46
DO
Clock signal of USIM card.
USIM_GND
47
Specified ground for USIM
card.
UG95 supports USIM card hot-plugging via the USIM_PRESENCE pin. The following figure shows the
reference design of the 8-pin USIM card.
USIM_VDD
USIM_GND/GND
USIM_RST
USIM_CLK
USIM_DATA
USIM_PRESENCE
22R
22R
22R
VDD_EXT
51K
100nF
USIM holder
GND
GND
ESD
33pF 33pF 33pF
VCC
RST
CLK
IO
VPP
GND
GND
USIM_VDD
15K
Module
Figure 23: Reference Circuit of the 8-Pin USIM Card
Quectel
Confidential