Yuga CLM920 TE5 LTE Module Hardware Manual

CLM920_TE5 LTE Module Hardware Manual
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YUGA Information Technology Co.,Ltd
line, peripheral circuit devices should be placed near the card slot. Keep layout of
USIM card as close to the module as possible.
② USIM card will lost or become unavailable when disturbed by RF, so the USIM
card slot should be placed away from the radio frequency radiation of the antenna.
③ UIM_DATA need connect to the VDD_EXT by the 47K resistance from internal,
needn’t pull up from external.
④UIM_DET is the pin that check the USIM card is inserted or not. It is high by
default and can detect the status of the SIM card through this PIN when hot plugging.
⑤ The 22R resistors should be added in series between the module and USIM card
to protect USIM card.
⑥ The ground of USIM slot and module have to maintain good connectivity.
3.7.2 UIM_DET Hot-Plug Reference Design
CLM920_TE5 module supports SIM hot-plugging.
UIM_DET pin as an input detective pin to determine whether the SIM card is inserted or
not. UIM_DET pin is pulled high by default.
Table 3- 10 SIM Hot-plug detective pins definitions
NO
UIM_DET state
Function description
1
high
SIM card is inserted, UIM_DET is high
2
low
SIM card is pulled out, UIM_DET is low
Figure 3- 15 Hot plugging of the USIM card
① Recommended to add a diode protection next to the UIM _DET pin of the module.
SIM_DET
VDD_EXT
SIM Connector
PIN 6
Module