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Asus AP1720-E2 User Manual

Page 93

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4-5

ASUS AP1720-E2 barebone server

1. The USB device wake-up feature requires a power supply that can

provide 500mA on the +5VSB lead for each USB port. Otherwise,
the system would 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. USB device wake-up (3-pin USBPW12, USBPW34)

Set these jumpers to +5V to wake up the computer from S1 sleep
mode (CPU stopped, DRAM refreshed, system running in low power
mode) using the connected USB devices. Set to +5VSB to wake up
from S3 and S4 sleep modes (no power to CPU, DRAM in slow
refresh, power supply in reduced power mode).

4. CPU external frequency selection (6-pin J1)

This jumper allows you to select the CPU external frequency (or bus clock).

NCCH-DL

®

NCCH-DL USB device wake up

1

2

(Default)

+5V

+5VSB

2

3

USBPW12

1

2

USBPW34

(Default)

+5V

+5VSB

2

3

NCCH-DL

®

NCCH-DL CPU external frequency selection

J1

Auto-detect

CPU FSB

100 MHz

(Default)

133 MHz

166 MHz

200 MHz

2 4 6

2 4 6

2 4 6

1 3 5

1 3 5

1 3 5

1 3 5

1 3 5

2 4 6

2 4 6

To ensure system stability, it is recommened that you keep the default
setting.