xN930 M.2 Hardware User Guide
Table 11 Host Radio Disable Interface (W_DISABLE#)
Requirement
Detailed Description
Radio disable duration
On reception of a HW or SW disable signal, the WWAN module
will initiate within one
second
the mandatory cellular procedures
(which are dependent on current state) for disconnecting from
the cellular network. The time taken to complete the procedures
will be dependent on external factors including but not limited
to:
3G/4GPP specifications, network implementation, radio
conditions, etc. Once those procedures are complete, the WWAN
module will switch off the RF.
Radio enable duration
On reception of a hardware or software enable signal the
WWAN module will initiate within one second the mandatory
cellular procedures for connecting to the cellular network.
Radio enable during selective suspend
If radio is disabled due to W_DISABLE# assertion and WWAN
module is in selective suspend, then W_DISABLE# de-assertion
shall be detected by WWAN module and the module shall
initiate exit from selective suspend.
3.4.3
LED Interface – Status Indicator
An LED will be used to provide status indications to users via system provided
indicators.
LED#1 (pin 10) is an active low output signal intended to drive system-mounted LED
indicators. These signals shall be capable of sinking to ground a minimum of 9.0 mA at up to
a maximum VOL of 400 mV. The LED has four defined states.
Table 12 LED#1 Signal
Signal Name
Detailed Description
Pin
Direction
(WWAN)
Voltage
Level
LED#1
LED Status Indicator
10
O (OD)
3.3 V
is an example of how an LED indicator is typically connected in a platform/system
using 3.3 V. The series resistor can be adjusted to obtain the desired brightness.
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