
UMTS/HSPA Module Series
UG96 Hardware Design
UG96_Hardware_Design 40 / 76
automatically.
USIM_RST
44
DO
Reset signal of (U)SIM card
USIM_DATA
45
IO
Data signal of (U)SIM card
Pull-up to USIM_VDD with
4.7k resistor internally.
USIM_CLK
46
DO
Clock signal of (U)SIM card
USIM_GND
47
Specified ground for (U)SIM
card
UG96 supports (U)SIM card hot-plug via the USIM_PRESENCE pin. The following figure shows a
reference design for (U)SIM interface with an 8-pin (U)SIM card connector.
USIM_VDD
USIM_GND/GND
USIM_RST
USIM_CLK
USIM_DATA
USIM_PRESENCE
22R
22R
22R
VDD_EXT
51K
100nF
GND
GND
ESD
33pF 33pF 33pF
VCC
RST
CLK
IO
VPP
GND
GND
USIM_VDD
15K
Module
(U)SIM card connector
Figure 23: Reference Circuit of (U)SIM Interface with an 8-Pin (U)SIM Card Connector
If (U)SIM card detection function is not needed, please keep USIM_PRESENCE unconnected. A
reference circuit for (U)SIM interface with a 6-pin (U)SIM card connector is illustrated in the following
figure.