LISA-U series - System Integration Manual
UBX-13001118 - R17
Advance information
System description
Page 52 of 190
Follow these guidelines connecting the module to a SIM connector implementing the SIM presence detection:
Connect the UICC / SIM contacts C1 (VCC) and C6 (VPP) to the
VSIM
pin of the module
Connect the UICC / SIM contact C7 (I/O) to the
SIM_IO
pin of the module
Connect the UICC / SIM contact C3 (CLK) to the
SIM_CLK
pin of the module
Connect the UICC / SIM contact C2 (RST) to the
SIM_RST
pin of the module
Connect the UICC / SIM contact C5 (GND) to ground
Connect one pin of the mechanical switch integrated in the SIM connector (e.g. the SW2 pin as described in
Figure 24) to the
GPIO5
input pin of the module
Connect the other pin of the mechanical switch integrated in the SIM connector (e.g. the SW1 pin as
described in Figure 24) to the
V_INT
1.8 V supply output of the module by means of a strong (e.g. 1 k
)
pull-up resistor, as the R1 resistor in Figure 24
Provide a weak (e.g. 470 k
) pull-down resistor at the SIM detection line, as the R2 resistor in Figure 24
Provide a 100 nF bypass capacitor (e.g. Murata GRM155R71C104K) at the SIM supply line (
VSIM
), close to
the specific pad of the SIM connector, to prevent digital noise
Provide a bypass capacitor of about 22 pF to 47 pF (e.g. Murata GRM1555C1H330J) on each SIM line
(
VSIM
,
SIM_CLK
,
SIM_IO
,
SIM_RST
), very close to each specific pad of the SIM connector, to prevent RF
coupling especially in case the RF antenna is placed closer than 10 - 30 cm from the SIM card holder
Provide a very low capacitance (i.e. less than 10 pF) ESD protection (e.g. Tyco Electronics PESD0402-140) on
each externally accessible SIM line, close to each specific pad of the SIM connector: ESD sensitivity rating of
the SIM interface pins is 1 kV (Human Body Model according to JESD22-A114), so that, according to the
EMC/ESD requirements of the custom application, higher protection level can be required if the lines are
externally accessible on the application device
Limit capacitance and series resistance on each SIM signal (
SIM_CLK
,
SIM_IO
,
SIM_RST
) to match the
requirements for the SIM interface (27.7 ns is the maximum allowed rise time on the
SIM_CLK
line, 1.0 µs is
the maximum allowed rise time on the
SIM_IO
and
SIM_RST
lines)
LISA-U series
50
VSIM
48
SIM_IO
47
SIM_CLK
49
SIM_RST
4
V_INT
51
GPIO5
SIM CARD
HOLDER
C
5
C
6
C
7
C
1
C
2
C
3
SIM Card
Bottom View
(contacts side)
C1
VPP (C6)
VCC (C1)
IO (C7)
CLK (C3)
RST (C2)
GND (C5)
C2 C3
C5
J1
C4
SW1
SW2
D1 D2 D3 D4 D5 D6
R2
R1
C
8
C
4
Figure 24: Application circuit for the connection to a single removable SIM card, with SIM detection implemented
Reference
Description
Part Number - Manufacturer
C1, C2, C3, C4
33 pF Capacitor Ceramic COG 0402 5% 25 V
GRM1555C1H330JZ01 - Murata
C5
100 nF Capacitor Ceramic X7R 0402 10% 16 V
GRM155R71C104KA01 - Murata
D1, D2, D3,
D4, D5, D6
Very Low Capacitance ESD Protection
PESD0402-140 - Tyco Electronics
R1
1 k
Resistor 0402 5% 0.1 W
RC0402JR-071KL - Yageo Phycomp
R2
470 k
Resistor 0402 5% 0.1 W
RC0402JR-07470KL- Yageo Phycomp
J1
SIM Card Holder
6 + 2 positions, with card presence switch
Various Manufacturers,
CCM03-3013LFT R102 - C&K Components
Table 25: Example of components for the connection to a single removable SIM card, with SIM detection implemented
