8.2
SIM card slot
CN2 is a micro-SIM card slot.
The SIM card slot only supports micro-SIM cards and it supports card detect function which can detect the
presence of the SIM card. When the SIM-card exists, the CD signal pin is floating. Otherwise, the signal pin
is pulled down. As R8 is soldered, the floating state is replaced by the pull-up state. Only a Class-C SIM card
handling 1.8V is supported.
Table 6.
SIM card slot
Connector
Pin number
Pin name
Signal name
Function
CN2
1
CD
SIM_DETECT
SIM card detection
2
GND
-
Power
3
GND
-
Power
4
GND
-
Power
5
GND
-
Power
C1
VCC
VDD_SIM
Power
C2
RST
SIM_RST
SIM RST
C3
CLK
SIM_CLK
SIM clock
C5
GND
-
Power
C6
VPP
VDD_SIM
Power
C7
I/O
SIM_DATA
SIM data
8.3
Tag connector
CN3 is a tag connector that provides a direct debug port for the MCU.
The tag connector is implemented on the B-L462E-CELL1 board. The tag connector is a 10-pin footprint
supporting SWD mode, which is shared with the same signals as ST-LINK.
The TC2050-IDC-NL cable is used to link ST-LINK and tag connector on the B-L462E-CELL1 Discovery kit for
IoT nodes, so that the STM32L4 in the module can be easily programmed and debugged without any extra
accessory.
Figure 9.
Tag connector
UM2743
SIM card slot
UM2743
-
Rev 1
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