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ASUS P4B-M motherboard user guide
2-19
2. USB port selection (3-pin CNRUSB0, CNRUSB1)
When set to pins 1-2, these jumpers allow you to activate USB port 3.
Setting the jumpers to pins 2-3 activates the CNR slot. Both jumpers
are set to pins 1-2 by default.
Figure 2-24 USB Port Selection
®
P4B-M
P4B-M USB/CNR Selection
CNRUSB0
CNRUSB1
Use CNR USBUse External USB Ports
(Default)
2312
The USB port 2 is always active regardless of the settings of these
jumpers.
3. Keyboard power (3-pin KBPWR)
This jumper allows you to enable or disable the keyboard wake-up
feature. Set this jumper to pins 1-2 (+5VSB) if you wish to wake up the
computer when you press a key on the keyboard (the default is the
Space Bar). This feature requires an ATX power supply that can supply
at least 1A on the +5VSB lead, and a corresponding setting in the
BIOS (see section 4.5.1 Power Up Control). The default is setting is on
pins 1-2 (+5V).
Figure 2-25 Keyboard Power Settings
®
P4B-M
P4B-M Keyboard Power Setting
+5V
(Default)
+5VSB
KBPWR
1
2
2
3