Asus P4XP-X User Manual - Page 24

Jumpers - ram

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1.11 Jumpers 1. USB device wake-up (3-pin USBPW12) Set this jumper to +5V (pins 1-2) to wake up the computer from S1 sleep mode (CPU stopped, DRAM refreshed, system running in low power mode) using a connected USB device. Set to +5VSB (pins 2-3) to wake up from S3 sleep mode (no power to CPU, DRAM in slow refresh, power supply in reduced power mode). 1. This feature requires a power supply with at least 1A on the +5VSB lead when the jumper is set to +5VSB. Otherwise, the system does not power up. 2. The total current consumed must NOT exceed the power supply capability (+5VSB) whether under normal condition or in sleep mode. 3. Only the USBPW12 connector supports USB device wake-up from S3. 4. The USB wake-up function is not supported in S5 mode. USBPW12 ® P4XP-X 2 1 +5V 3 2 +5VSB (Default) P4XP-X USB Device Wake Up 2. Clear RTC RAM (CLRTC1) This jumper allows clearing the Real Time Clock (RTC) RAM in CMOS. You can clear the CMOS memory of date, time, and system setup information by erasing the CMOS RTC RAM data. To erase the RTC RAM, (1) Turn OFF the computer and unplug the power cord; (2) Move the jumper cap from pins 1-2 (default) to pins 2-3. Keep the cap on pins 2-3 for about 5~10 seconds, then move the cap back to pins 1-2; (3) Plug the power cord and turn ON the computer; and (4) Hold down the key during the boot process and enter BIOS setup to re-enter data. 1-14 ® P4XP-X CLRTC1 12 23 Normal (Default) Clear CMOS P4XP-X Clear RTC RAM Setting Except when clearing the RTC default position. Removing th Chapter 1: Product introduction

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1-14
Chapter 1: Product introduction
1.11
Jumpers
1.
USB device wake-up (3-pin USBPW12)
Set this jumper to +5V (pins 1-2) to wake up the computer from S1 sleep mode
(CPU stopped, DRAM refreshed, system running in low power mode) using a
connected USB device. Set to +5VSB (pins 2-3) to wake up from S3 sleep mode
(no power to CPU, DRAM in slow refresh, power supply in reduced power mode).
2.
Clear RTC RAM (CLRTC1)
This jumper allows clearing the Real Time Clock (RTC) RAM in CMOS. You
can clear the CMOS memory of date, time, and system setup information by
erasing the CMOS RTC RAM data.
To erase the RTC RAM, (1) Turn OFF the computer and unplug the power
cord; (2) Move the jumper cap from pins 1-2 (default) to pins 2-3. Keep the cap
on pins 2-3 for about 5~10 seconds, then move the cap back to pins 1-2;
(3) Plug the power cord and turn ON the computer; and (4) Hold down the
<Del> key during the boot process and enter BIOS setup to re-enter data.
Except when clearing the RTC
default position. Removing th
P4XP-X
P4XP-X USB Device Wake Up
+5V
+5VSB
(Default)
USBPW12
3
2
1
2
P4XP-X
P4XP-X Clear RTC RAM Setting
Normal
(Default)
1
2
Clear CMOS
3
2
CLRTC1
1.
This feature requires a power supply with at least 1A on the +5VSB lead
when the jumper is set to +5VSB. Otherwise, the system does not power up.
2.
The total current consumed must NOT exceed the power supply capability
(+5VSB) whether under normal condition or in sleep mode.
3.
Only the USBPW12 connector supports USB device wake-up from S3.
4.
The USB wake-up function is not supported in S5 mode.