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HUAWEI ME909 Series Mini PCIe Module
Hardware Guide Description of the Application Interfaces
Issue 0.1 (2013-06-09)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
15
3.4 Power Supply Time Sequence
Power on sequence
Do not toggle RESIN_N pin during the power on sequence. Pulling RESIN_N pin low
will extend time for module startup.
Figure 3-2 Power on timing sequence
Parameter Remarks Time (Nominal value) Unit
T
PD+
Power Valid to USB
D+ high
14 s
Power off Sequence
Cutting off 3.3 V will power off the module.
Figure 3-3 Power off timing sequence