Wakeup_In Signal - Huawei MU609 Hardware Manual

HUAWEI MU609 HSPA LGA Module
Hardware Guide
As the RESIN_N and POWER_ON_OFF signals are relatively sensitive, it is
recommended that you install a 10 nF–0.1 µF capacitor near the RESIN_N and
POWER_ON_OFF pins of the interface for filtering. In addition, when you design a
circuit on the PCB of the interface board, it is recommended that the circuit length not
exceed 20 mm and that the circuit be kept at a distance of 2.54 mm (100 mil) at least
from the PCB edge. Furthermore, you need to wrap the area adjacent to the signal
wire with a ground wire. Otherwise, the module may be reset due to interference.
The MU609 module supports hardware reset function. If the software of the MU609
module stops responding, you can reset the hardware through the RESIN_N signal as
shown in Figure 3-7 .When a low-level pulse is supplied through the RESIN_N pin, the
hardware will be reset. After the hardware is reset, the software starts powering on the
module and reports relevant information according to the actual settings. For example,
the AT command automatically reports ^SYSSTART.
Figure 3-7 Reset pulse timing

3.4.4 WAKEUP_IN Signal

WAKEUP_IN pin is the authorization signal of MU609 entering sleep mode. If this pin
is floating, it will keep in low level by default. Table 3-1 shows the definition of the
WAKEUP_IN signal.
This pin is pulled up to high level (1.8 V), the module cannot enter sleep mode.
Figure 3-8 Connections of the WAKEUP_IN pin
Issue 04 (2016-12-12)
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Copyright © Huawei Technologies Co., Ltd.
Description of the Application Interfaces
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