Novatel Wireless NRM-EU870D Manuale Utente
35
Novatel Wireless
Revision 1
SIM Design Guidelines
Description
The SIM contains subscriber identification, specification and authentication information; and is
required to obtain service. 3.0V and 1.8V SIMs are supported. The physical size and contact
location for the “Plug-in SIM” format is defined in reference [2]. Contact identification is defined in
reference [7]. Electrical characteristics for a 3V SIM are defined in reference [3], and for a 1.8V
SIM in reference [4]. Power sequencing and general protocol operation is defined in reference
[8]. The figure below shows a “Plug-in SIM”.
required to obtain service. 3.0V and 1.8V SIMs are supported. The physical size and contact
location for the “Plug-in SIM” format is defined in reference [2]. Contact identification is defined in
reference [7]. Electrical characteristics for a 3V SIM are defined in reference [3], and for a 1.8V
SIM in reference [4]. Power sequencing and general protocol operation is defined in reference
[8]. The figure below shows a “Plug-in SIM”.
C1
VCC
C5
GND
C2
RST
C6
VPP
C3
CLK
C7
IO
C4
reserved
C8
reserved
Figure 6: Plug-in SIM (shown from contact side)
References
1. 3GPP TS 01.04: "Abbreviations and acronyms"
2. 3GPP TS 11.11: “Specification of the Subscriber Identity Module - Mobile Equipment
2. 3GPP TS 11.11: “Specification of the Subscriber Identity Module - Mobile Equipment
(SIM - ME) interface”
3. 3GPP TS 11.12: "Specification of the 3 Volt Subscriber Identity Module - Mobile
Equipment (SIM - ME) interface".
4. 3GPP TS 11.18: “Specification of the 1.8 Volt Subscriber Identity Module - Mobile
Equipment (SIM - ME) interface”
5. 3GPP TS 51.010-1 “Mobile Station (MS) conformance specification; Part 1: Conformance
specification”
6. ISO/IEC 7816-1: “Identification cards – Integrated circuit cards with contacts – Part 1:
Physical characteristics”
7. ISO/IEC 7816-2: “Identification cards – Integrated circuit cards with contacts – Part 2:
Dimensions and locations of the contacts
8. ISO/IEC 7816-3 “Identification cards – Integrated circuit cards with contacts – Part 3:
Electronic signals and transmission protocols”
Operation of SIM interface
For the purposes of this document, the SIM interface is the interface between the SIM and the
laptop at the SIM connector. The ME includes the HSDPA module and laptop SIM circuit.
The SIM interface provides power, clock, reset and data to the SIM. The data is half-duplex (bi-
directional but only able to transfer data in one direction at any time) circuit implemented as an
open-collector signal. When data is transmitted, the ME or the SIM will pull the line to a low
voltage, otherwise the line is pulled up through a resistor. The SIM operates in a
command/response mode where it will only transmit data in response to a received command.
One exception to this is the Answer-To-Reset (ATR) when the SIM transmits data in response to
a reset.
laptop at the SIM connector. The ME includes the HSDPA module and laptop SIM circuit.
The SIM interface provides power, clock, reset and data to the SIM. The data is half-duplex (bi-
directional but only able to transfer data in one direction at any time) circuit implemented as an
open-collector signal. When data is transmitted, the ME or the SIM will pull the line to a low
voltage, otherwise the line is pulled up through a resistor. The SIM operates in a
command/response mode where it will only transmit data in response to a received command.
One exception to this is the Answer-To-Reset (ATR) when the SIM transmits data in response to
a reset.