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HUAWEI MC509 CDMA LGA Module
Hardware Guide
Description of the Application Interfaces
Issue 01 (2011-04-08)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
29
Table 3-6 Power on timing
Parameter
Comments
Time(Nominal
values)
Units
T
PON
POWER_ON_OFF turn on time.
0.5< T
PON
<1
sec
T
PD+
POWER_ON_OFF Valid to USB
D+ high
4
sec
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
Table 3-7 Power off timing
Parameter
Comments
Time(Nominal values)
Units
T
POFF
POWER_ON_OFF turn off time.
2.5< T
POFF
<4
sec
T
PD+
POWER_ON_OFF Valid to USB
D+ high
4.6
sec