Specifications

Electrical Specifications

Rev 8 Apr.14 Proprietary and Confidential - Contents subject to change 35

W_DISABLE_N — Wireless disable

Note: Wireless disable

signals support is optional.

The host device uses W_DISABLE_N (pin 20) to enable/disable the WWAN or

radio modem. When disabled, the modem cannot transmit or receive information.

Letting this signal float high allows the module to operate normally. This switch

follows the behavior described in [9] PCI Express Mini Card Electromechanical

Specification Revision 1.2. This pin has a 20 k pull-up resistor. See Figure 3-6

on page 35 for a recommended implementation.

When integrating with your host device, keep the following in mind:

• The 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 module

has an internal pull-up resistor to Module Power (3.3V) in place, so if the

signal is floating or (high impedance), then the radio is on.

• Wait for two seconds after asserting W_DISABLE_N before disconnecting

power.

• If the host never needs to assert this power state control to the module, leave

this signal unconnected from the host interface.

Figure 3-6: Recommended wireless disable connection

WAN_LED_N—LED output

Note: WAN_LED_N signal

support is optional.

The module drives the LED output according to [9] PCI Express Mini Card

Electromechanical Specification Revision 1.2.

Note: The LED configuration is customizable. Contact your Sierra Wireless account repre-

sentative for details.

MiniCard

Wireless disable control

(W_DISABLE_N)

20k

Host

VCC