Specifications

Power Interface
Rev 2.0 Apr.10 Proprietary and Confidential 19
Disconnected state
Note: The difference
between the Discon-
nected and Off states is
that, in the Off state, the
module is still connected to
the power source and
draws minimal current.
This state occurs when there is no power to the module—the host power source
is disconnected from the module and all voltages associated with the module are
at 0 V.
Whether the host device is also powered off depends on the power rail design:
• If the connection between the power rail and the module is controlled by the
host, the host can stay powered on and cut the power to put the module into
the disconnected state.
• If the power rail is shared between the host device and the module, the host
is powered off when the module is powered off.
Off state
In this state, the host is powered up and the module is powered down (but still
connected to the power source).
The host keeps the module powered off by driving the W_Disable# signal low. In
this state, the module draws minimal current.
The module enters the Off state if W_Disable# is driven low and power (VCC) is
applied to the module, or if the module is in a powered state and W_Disable# is
driven low for a module-dependent minimum period. See State change: Power
off/on on page 23 for details.
For additional MC5728V information, see W_Disable# — Wireless disable on
page 104.
Note: This is the default
state when VCC is first
applied in the absence of
W_Disable# control.
Normal state
This is the active state of the module. In this state:
• The module is fully powered.
• The module is capable of placing/receiving calls or establishing data connec-
tions on the wireless network.
• The USB interface is fully active.
Low power state
In this state (also called “airplane mode”), RF (both Rx and Tx) is disabled in the
module, but the USB interface is still active. This state is controlled though the
host interface by the following software commands:
• +CFUN=0 command (AT Command Set for User Equipment (UE) (Release
6))
• CNS_RADIO_POWER [0x1075] (CDMA CnS Reference (Document
2130754))
• Disable Modem command (MC87XX Modem CnS Reference (Document
2130602)).