User's Manual

Intel® Centrino® Wireless-N 105 (Canyon Peak)
Intel® Centrino® Wireless-N 135 (Canyon Peak w/Bluetooth)
Intel® Centrino® Wireless-N 2200 (Marble Peak)
Intel® Centrino® Wireless-N 2230 (Jackson Peak 1)
Intel® Centrino® Advanced-N 6235 (Jackson Peak 2)
Hardware Specification, Rev. 2.2
Intel Confidential
473288
27
SW state. The Card should resume normal operation within seconds of de-assertion of the
W_Disable# signal. Note: Due to the potential of a software disable state, the Wi-Fi radio will

The system is required to assure that W_Disable# be in a deterministic state (asserted or de-
asserted) whenever power is applied to the Card (i.e., whenever either +3.3V is present).
For JP2 the internal pull up resistor on this pin is ~37Kohm typical value (Min 25Kohm, Max
58Kohm).
For JP1, CyP, MP, CyP+Bluetooth the internal pull up resistor on this pin is ~45Kohm typical
value (Min 34Kohm, Max 71Kohm).
The operation of the signal is as following
Float = Radio is on.
Off (Active low: Vil = 0.0v [+/-0.3]) = Radio transmitter is turned off and incapable of
transmitting
Table 12: Hardware RF Disable Logic
Software
Setting
Hardware
Switch
Radio Transmitter
Function
Enabled
Enabled/Float
Enabled
Enabled
Disabled/Low
Disabled
Disabled
Enabled/Float
Disabled
Disabled
Disabled/Low
Disabled
3.5.2 Bluetooth Hardware RF Disable
W_DISABLE#_2 is the HW RF Kill for the Bluetooth radio.
Asserting W_DISABLE#_2 signal will result in a complete shutdown of the Bluetooth part.The
result from the user perspective is like removing the Bluetooth device from the laptop.
The W_DISABLE#_2 internal pull up resistor is 59Kohm typical value (Min 42Kohm, Max
88Kohm).
Optional SW RF Kill: This feature can be enabled during installation using a special command.
See TPS for more details
As opposed to the HW RF kill which is similar to device removal, the SW RF kill is actually a
Bluetooth driver disable command.
The following table summarizes the differences between SW and HW RF kill options:
Option
Bluetooth
HW RF Kill
Bluetooth
SW RF Kill
RF Activity
Off
Off
USB Interface
Off
On
LED State
Off
On
(*) Assuming WiFi is in RF Kill too.
Please note, that conflicts between Bluetooth SW and HW RF kill commands might occur. The
SW stack does not handle such conflicts. Therefore, a recommended practice is not to enable
both mechanisms. If the OEM does wish to enable both Bluetooth SW and HW RF Kill
mechanisms, it is recommended to at least to pop up a message that user needs to make sure
Bluetooth activity.