Huawei MU736 - SIM_DET Pin

HUAWEI MU736 HSPA+ M.2 Module
Hardware Guide
Description of the Application Interfaces
Issue 05 (2014-01-14)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
32
Figure 3-20 Connections of the BodySAR_N pin
Module
(Modem)
BB Chip
1.8V
BodySAR_N
VCC From Host
10 kΩ
Proximity
sensor
USB Host AP
It is recommended not to add a diode on the BodySAR_N pin outside the MU736
module.
3.4.9 SIM_DET Pin
MU736 supports USIM Hot Swap function.
MU736 provides an input pin (SIM_DET) to detect whether the USIM card is present
or not. This pin is an edge trigger pin.
Table 3-9 Function of the SIM_DET pin
No.
SIM_DET
Function
1
Rising edge
USIM Card insertion.
If the USIM Card is present, SIM_DET pin should be high.
2
Falling edge
USIM Card removal.
If the USIM Card is absent, SIM_DET pin should be low.