Huawei ME909s Series - Power Supply Time Sequence

HUAWEI ME909s Series LTE Mini PCIe Module
Hardware Guide
Description of the Application Interfaces
Issue 02 (2016-09-07)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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To minimize the RF radiation through the power lines, it is suggested to add ceramic capacitors
of 10 pF and 100 nF in the power lines beside the Mini PCIe connector on the host side.
3.3.2 Power Supply Time Sequence
Power on Sequence
Figure 3-2 Power on timing sequence
Parameter
Remarks
Time (Nominal value)
Unit
T
PD+
Power Valid to USB D+ high
5.5
s
Power off Sequence
Cutting off the VCC_3V3 power supply will power off the module.
Figure 3-3 Power supply time sequence for power cycling