Specifications

CDMA and GSM / UMTS Mini Card Hardware Integration Guide
104 Proprietary and Confidential 2130114
W_Disable# — Wireless disable
The W_Disable# signal (pin 20) is an input to the module from the host device to
control the Power state (power on and shutdown of the MC5728V module,
depending on the state of the signal).
When integrating with your host device, keep the following in mind.
• This signal is an input to the module and should be driven LOW only for its
active state (controlling the power state); otherwise it should be floating or
(High impedance). It should never be driven to a logic high level. The
MC5728V module has an internal pull-up resistor to Module Power (3.3V) in
place, so if the signal is floating or (high impedance), the module will power
on.
• If the host never needs to assert this power state control to the MC5728V
module, leave this signal unconnected from the host interface. Figure 2-1 on
page 17 shows good design practice for connecting the W_DISABLE# signal.
This allows for open collector output when not being asserted by the host
device.