Power Supply Time Sequence - Huawei MC509 Hardware Manual

HUAWEI MC509 CDMA Mini PCIe Module
Hardware Guide

3.3.2 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
T
PD+
Power off Sequence
Cutting off VCC_3V3 will power off the module.
Figure 3-3 Power off timing sequence
Issue 03 (2014-12-26)
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.
Remarks
Power valid to USB D+ high
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Description of the Application Interfaces
Time (Nominal value)
4
Unit
s
16