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Guidelines for single SIM chip connection
A solderable SIM chip (M2M UICC Form Factor) must be connected the SIM card interface of LARA-R2 series
modules as described in Figure 47.
Follow these guidelines, connecting the module to a solderable SIM chip without SIM presence detection:
Connect the UICC / SIM contacts C1 (VCC) 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.
Provide a 100 nF bypass capacitor (e.g. Murata GRM155R71C104K) at the SIM supply line (VSIM) close to the
related pad of the SIM chip, to prevent digital noise.
Provide a bypass capacitor of about 22 pF to 47 pF (e.g. Murata GRM1555C1H470J) on each SIM line (VSIM,
SIM_CLK, SIM_IO, SIM_RST), to prevent RF coupling especially in case the RF antenna is placed closer than
10 - 30 cm from the SIM card holder.
Limit the capacitance and series resistance on each signal of the SIM interface (SIM_CLK, SIM_IO, SIM_RST)
to match the SIM specifications requirements (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).
LARA-R2 series
V_INT
4
GPIO5
42
VSIM
41
SIM_IO
39
SIM_CLK
38
SIM_RST
40
Figure 47: Application circuit for the connection to a single solderable SIM chip, with SIM detection not implemented
Reference
Description
C1, C2, C3, C4
47 pF Capacitor Ceramic C0G 0402 5% 50 V
C5
100 nF Capacitor Ceramic X7R 0402 10% 16 V
U1
SIM chip (M2M UICC Form Factor)
Table 37: Example of components for the connection to a single solderable SIM chip, with SIM detection not implemented
UBX-16010573 - R12
TP
C1
C2 C3
LARA-R2 series - System Integration Manual
C4
C5
Part Number - Manufacturer
GRM1555C1H470JA01 - Murata
GRM155R71C104KA01 - Murata
Various Manufacturers
SIM CHIP
2
VPP (C6)
8
VCC (C1)
8
C1
C5
1
3
IO (C7)
7
C2
C6
2
6
C3
C7
3
6
CLK (C3)
5
C4
C8
4
7
RST (C2)
SIM Chip
Bottom View
1
GND (C5)
(contacts side)
U1
Page 99 of 157
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