User's Manual

LE940B6 Hardware User Guide
1VV0301331 Rev. 1.8 - 2017-03-15
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11.3. SIM Interface
This section presents the recommended schematics for the design of SIM interfaces on the
application boards. The LE940B6 supports two external SIM interfaces.
11.3.1. SIM Schematic Example
Figure 27 illustrates in particular how to design the application side, and what values the
components should have.
Figure 27: SIM Schematics
NOTE:
An external pull-up resistor on SIMIO is not required.
The LE940B6 module contains an internal pull-up resistor on SIMIO.
Table 39 lists the values of C1 to be adopted with the LE940B6 product:
Table 39: SIM Interface – C1 Range
Product P/N C1 Range (nF)
LE940B6 100 nF
Refer to the following document for details:
• Ref 4: SIM Integration Design Guide