TOBY-L1 and MPCI-L1 series - System Integration Manual
UBX-13001482 - R04
Advance Information
Design-in
Page 55 of 90
2.5
SIM interface
2.5.1
Guidelines for SIM circuit design
Guidelines for SIM cards, SIM connectors and SIM chips selection
The ISO/IEC 7816, the ETSI TS 102 221 and the ETSI TS 102 671 specifications define the physical, electrical and
functional characteristics of Universal Integrated Circuit Cards (UICC), which contains the Subscriber
Identification Module (SIM) integrated circuit that securely stores all the information needed to identify and
authenticate subscribers over the LTE network.
Removable UICC / SIM card contacts mapping is defined by ISO/IEC 7816 and ETSI TS 102 221 as follows:
•
Contact C1 = VCC (Supply)
It must be connected to
VSIM
or
UIM_PWR
•
Contact C2 = RST (Reset)
It must be connected to
SIM_RST
or
UIM_RESET
•
Contact C3 = CLK (Clock)
It must be connected to
SIM_CLK
or
UIM_CLK
•
Contact C4 = AUX1 (Auxiliary contact)
It must be left not connected
•
Contact C5 = GND (Ground)
It must be connected to
GND
•
Contact C6 = VPP (Programming supply)
It must be connected to
VSIM
or
UIM_PWR
•
Contact C7 = I/O (Data input/output)
It must be connected to
SIM_IO
or
UIM_DATA
•
Contact C8 = AUX2 (Auxiliary contact)
It must be left not connected
A removable SIM card can have 6 contacts (C1, C2, C3, C5, C6, C7) or 8 contacts, providing also the auxiliary
contacts C4 and C8. Only the 6 contacts C1, C2, C3, C5, C6, C7 are required and must be connected to the SIM
interface of the module as described above.
Removable SIM card are suitable for applications where the SIM changing is required during the product lifetime.
A SIM card holder can have 6 or 8 positions if a mechanical card presence detector is not provided, or it can
have 6+2 or 8+2 positions if two additional pins related to the normally-open mechanical switch integrated in
the SIM connector for the mechanical card presence detection are provided. Select a SIM connector providing
6+2 or 8+2 positions if the optional SIM detection feature is required by the custom application, otherwise a
connector without integrated mechanical presence switch can be selected.
Solderable UICC / SIM chip contacts mapping (M2M UICC Form Factor) is defined by ETSI TS 102 671 as:
•
Package Pin 8 = UICC Contact C1 = VCC
It must be connected to
VSIM
or
PWR
•
Package Pin 7 = UICC Contact C2 = RST
It must be connected to
SIM_RST
or
UIM_RESET
•
Package Pin 6 = UICC Contact C3 = CLK
It must be connected to
SIM_CLK
or
UIM_CLK
•
Package Pin 5 = UICC Contact C4 = AUX1
It must be left not connected
•
Package Pin 1 = UICC Contact C5 = GND
It must be connected to
GND
•
Package Pin 2 = UICC Contact C6 = VPP
It must be connected to
VSIM
or
UIM_PWR
•
Package Pin 3 = UICC Contact C7 = I/O
It must be connected to
SIM_IO
or
UIM_DATA
•
Package Pin 4 = UICC Contact C8 = AUX2
It must be left not connected
A solderable SIM chip has 8 contacts and can provide also the auxiliary contacts C4 and C8, but only the 6
contacts C1, C2, C3, C5, C6, C7 are required and must be connected to the SIM interface of the module as
described above.
Solderable SIM chips are suitable for M2M applications where it is not required to change the SIM once installed.
