Yuga CLM920 TE3 LTE Module hardware usage guide V1.4

CLM920_TE3 hardware user guide Version 1.2
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Figure 10 UART Debug Pin
3.8 USIM Interface
CLM920_TE3 provides a USIM card interface compatible with ISO 7816-3 standard, and
supports 1.8V/3.0V USIM card. The module automatically identifies 1.8V or 2.85V USIM card.
Figure 3-9 USIM PINs
PINs
Name
I/O
Level
Description
13
USIM_DET
DI
1.8V
SIM Detect
14
VREG_USIM
PO
1.8V/2.85V
USIM Power
15
USIM_DATA
IO
1.8V/2.85V
USIM Data
16
USIM_CLK
DO
1.8V/2.85V
USIM Clock
17
USIM_RESET
DO
1.8V/2.85V
USIM Reset
3.8.1 USIM Reference circuit
CLM920_TE3 does not own USIM card slot, users need to design USIM card slot on their
own interface board.
USIM interface as below：
Figure 11 USIM Reference circuit
Design note：
 USIM interface reference design diagram is shown, the interface line should select the
ESD protection device with a value less than 10 PF, and enhance the antistatic ability.
 USIM slot should be placed far away from the antenna RF radiation place
 SIM_DET pin detect "USIM" inserted or not. The default is high. When hot plug is used,
the SIM card is detected by the PIN.