Ublox SARA-N2 Series, System Integration Manual

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SARA-N2 / N3 series - System integration manual
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Guidelines for single SIM chip connection
Figure 31 describes an application circuit for the connection to a solderable SIM chip (M2M UICC Form
Factor).
Follow these guidelines connecting the module to a solderable SIM chip:
• Connect the UICC / SIM contact 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 33 pF (e.g. Murata GCM1555C1H330JA16) 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 capacitance and series resistance on each SIM signal ( SIM_CLK , SIM_IO , SIM_RST ) to
match the requirements for the SIM interface regarding maximum allowed rise time on the lines.
41
VSIM
39
SIM_IO
38
SIM_CLK
40
SIM_RST
SIM chip
SIM chip
bottom view
(contacts side)
C1
VPP (C6)
VCC (C1)
IO (C7)
CLK (C3)
RST (C2)
GND (C5)
C2 C3 C5
U1
C4
2
8
3
6
7
1
C1 C5
C2 C6
C3 C7
C4 C8
8
7
6
5 1
2
3
4
SARA-N2/N3
Figure 31: Application circuit for the connection to a single solderable SIM chip
Reference Description Part number - Manufacturer
C1, C2, C3, C4 33 pF capacitor ceramic C0G 0402 5% 50 V GCM1555C1H330JA16 - Murata
C5 100 nF capacitor ceramic X7R 0402 10% 16 V GCM155R71C104KA55 - Murata
U1 SIM chip (M2M UICC form factor) Various manufacturers
Table 21: Example of components for the connection to a solderable SIM chip
Guidelines for single SIM card connection with detection
☞
The SIM card detection functionality over GPIO is not supported by the SARA-N2 series and by the
“00” product version of the SARA -N3 series modules.
An application circuit for connecting to a single removable SIM card placed in a SIM card holder is
described in
Figure 32 , where the optional SIM card detection feature is implemented.
Follow these guidelines while connecting the module to a SIM connector implementing SIM presence
detection:
• Connect the UICC / SIM contact 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.