Huawei MU709 Series Hardware Manual page 37

HUAWEI MU709 Series HSPA+ LGA Module
Hardware Guide
Figure 3-15 Pin definition of USIM Socket
Pin 1:
Pin 2:
Pin 3:
Pin 5:
Pin 6:
Pin 7:
Pin 9:
Figure 3-16 Connections of the USIM_DET pin
CD is a pin detecting USIM card in the USIM socket.

If the USIM card is present, USIM_DET pin should be high, and the CD is open.
Issue 09 (2017-12-15)
USIM_VCC
USIM_RESET
USIM_CLK
GND
VPP(Programming Voltage)
USIM_DATA
USIM_DET
Module
1.8 V
(DCE)
1 kΩ
USIM_DET
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
Description of the Application Interfaces
USIM Socket
CD
470 pF
37