Huawei MU736 - LED# 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.
28

As the RESET# pin signal is relatively sensitive, it is recommended to install a 33
pF capacitor near to the M.2 pin.

Triggering the RESET# pin signal will lead to loss of all data in the module
and the removal of system drivers. It will also disconnect the module from
the network resulting in a call drop.
3.4.4 LED# Pin
MU736 provides an open drain signal to indicate the RF status.
Table 3-5 State of the LED# pin
No.
Operating Status
LED#
1
RF function is turned on
Outputs Low
2
RF function is turned off
Outputs High
Figure 3-15 shows the recommended circuits of the LED# pin. The brightness of LED
can be adjusted by adjusting the resistance of the series resistor.
Figure 3-15 Driving circuit
LED# pin output is different from HUAWEI MU733 module, because MU736
integrates a MOSFET inside.