Usim Card Interface; Usim Card Application - Quectel BC95 Hardware Design

Module
TXD
RI
RXD
GND
Please visit vendor web site to select the suitable RS-232 level shifter IC, such as: http://www.exar.com
and http://www.maximintegrated.com.

3.9. USIM Card Interface

The module contains one USIM interface to allow the module to access the USIM card.

3.9.1. USIM Card Application

The USIM card interface supports the functionality of the 3GPP specification, which is intended for use
with a USIM application tool-kit.
The USIM card interface is powered by an internal regulator in the module. Only 3.0V USIM card is
supported.
Table 10: Pin Definition of the USIM Card Interface
Pin No. Pin Name
38 USIM_VDD
BC95_Hardware_Design
C1+
C1-
C2+
C2-
T1IN
1K
T2IN
T3IN
1K
T4IN
T5IN
/R1OUT
1K
R1OUT
R2OUT
R3OUT
RS-232 Level Shifter
Figure 12: Sketch Map for RS-232 Interface Match
Description
Supply power for USIM card.
USIM card voltage domain is 3.0V± 5%.
Confidential / Released
V+ GND
GND GND
VCC
3.3V
GND
V-
T2OUT
T1OUT
T5OUT
To PC Main Serial Port
T3OUT
T4OUT
R1IN
R2IN
R3IN
NB-IoT Module Series
BC95 Hardware Design
1
6
2
7
3
8
4
9
5
GND
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