HUAWEI MC509 Series CDMA LGA Module
Hardware Guide
Description of the Application Interfaces
Issue 02 (2013-05-06)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
27
Figure 3-4
Power on timing sequence
Table 3-4
Power on timing
Parameter
Comments
Time(Nominal values) Units
T
PON
POWER_ON_OFF turn on time.
0.5< T
PON
<1
s
T
PD+
POWER_ON_OFF Valid to USB
D+ high
4
s
If the DTE needs to detect the PID/VID of module during the BIOS phase, the
detection time should exceed the T
PD+
time.
Figure 3-5
Power off timing