HUAWEI ME909 Series LTE LGA Module
Hardware Guide
Description of the Application Interfaces
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
POWER_ON_OFF Valid to USB
D+ low
RESIN_N
The ME909 module supports hardware reset function. If the software of the ME909
module stops responding, you can reset the hardware through the RESIN_N signal as
shown in Figure 3-8 .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 3-8 Reset pulse timing
The RESIN_N pin must not be pulled down for more than 1s.
3.4.4 WAKEUP_IN Signal
WAKEUP_IN pin is the authorization signal of ME909 entering sleep mode.
If the signal is pulled up to high level (1.8 V), ME909 cannot enter sleep mode.
If this pin is floating, it will keep in low level by default.
Table 3-3 shows the definition of the WAKEUP_IN signal.
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