Huawei ME906s LTE M.2 Hardware Manual page 34

HUAWEI ME906s LTE M.2 Module
Hardware Guide
Figure 3-18 Connections of the USIM_DET pin
CD is a pin detecting of USIM in the USIM socket, in normal, there will be a detect pin
in the USIM socket.
 It is recommended not to add a diode on the USIM_DET pin outside the module.
 The normal SHORT USIM connector should be employed. The logic of
USIM_DET is shown as Figure 3-19 . High represents that USIM is inserted; Low
represents that USIM is removed.
 When USIM is inserted (hot), USIM_DET will change from Low to High;

When USIM is removed (hot), USIM_DET will change from High to Low;
 The module will detect the level of USIM_DET to support the hot swap.
Issue 05 (2019-03-25)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
Description of the Application Interfaces
34